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VB HELPER: HOWTO: CAPTURE VIDEO FROM A VIDEO DEVICE SUCH By Ken Tucker.. The avicap32.dll contains functions for connecting to and listing available video capture device on your system. First load a list of available video capture devices into a listbox. VB HELPER: HOWTO: USE A TABCONTROL WITH OWNER-DRAWN TABS To make an owner drawn tab control, the code sets the control's DrawMode property to OwnerDrawFixed. The SizeMode must be Fixed if the program needs to change the tab size. VB HELPER: INDEX CATEGORIES Stephens' Visual Basic Programming 24-Hour Trainer: Stephens' C# Programming with Visual Studio 2010 24-Hour Trainer: Beginning Database Design Solutions VB HELPER: INDEX: VB.NET Title Keywords ; HowTo: Quickly read and write the contents of a text file in VB .NET: VB.NET, NET, text file, grab, read, write: HowTo: Use routines to easily read and write a file's contents in VB .NET VB HELPER: HOWTO: MAKE A SWIRL IN VISUAL BASIC .NET See Swirl by Eric W. Weisstein from MathWorld, a Wolfram Web Resource.. The program plots points in polar coordinates where the intensity of a point is given by: F(r, t) = Sin(6 * Cos(r) - n * t) Subroutine DrawSwirl draws the fractal. VB HELPER: HOWTO: CONVERT A CHARACTER TO AND FROM ITS Use Asc to get a character's ASCII code. Use Chr to convert an ASCII code into a character. Thanks to Adan Rivas: Private Sub Command2_Click() 'Code the character Label3 = Asc(Text1) 'clears text box Text1 = "" ' adds the coded character to textbox (label3) LABEL6 = LABEL6 + "," + Label3 ' set focus to textbox Text1.SetFocus 'decodes the coded character Text2 = Text2 + Chr(Label3) End Sub VB HELPER: HOWTO: MAKE A BOUNCING BALL ANIMATION IN VB .NET When the form loads, initialize the ball's position and direction vector .Turn on the form's DoubleBuffer style to reduce flicker. Private Const BALL_WID As Integer = 50 Private Const BALL_HGT As Integer = 50 Private m_Dx As Integer Private m_Dy As Integer Private m_X As Integer Private m_Y As Integer Private Sub Form1_Load(ByVal sender As System.Object, ByVal _ e As System.EventArgs) Handles VB HELPER: HOWTO: CREATE A WORD DOCUMENT WITH SOME Title: Create a Word document with some formatting in Visual Basic .NET: Description: This example shows how to create a Word document with some formatting in Visual Basic .NET. VB HELPER: HOWTO: DRAW A MANDELBROT SET WITH SMOOTHLY You may not have heard that Benoît Mandelbrot (November 20, 1924 - October 14, 2010) recently passed away. In his honor, I decided to enhance the Mandelbrot set program shown in an earlier example. VB HELPER: HOWTO: PRINT AND DISPLAY PRINT PREVIEWS IN VB .NET Title: Print and display print previews in VB .NET: Description: This example shows how to print and display print previews in VB .NET. It shows how to use the PrintDocument object to print, how to print with the PrintDialog control, and how to display a print preview with thePrintPreviewDialog.
VB HELPER: HOWTO: CAPTURE VIDEO FROM A VIDEO DEVICE SUCH By Ken Tucker.. The avicap32.dll contains functions for connecting to and listing available video capture device on your system. First load a list of available video capture devices into a listbox. VB HELPER: HOWTO: USE A TABCONTROL WITH OWNER-DRAWN TABS To make an owner drawn tab control, the code sets the control's DrawMode property to OwnerDrawFixed. The SizeMode must be Fixed if the program needs to change the tab size. VB HELPER: HOWTO: CREATE A WORD DOCUMENT WITH SOME A Visual Basic program can open the Word application and use it as a server to manipulate Word documents. First open the Add Referencesdialog.
VB HELPER: HOWTO: PRINT AND DISPLAY PRINT PREVIEWS IN VB .NET Title: Print and display print previews in VB .NET: Description: This example shows how to print and display print previews in VB .NET. It shows how to use the PrintDocument object to print, how to print with the PrintDialog control, and how to display a print preview with thePrintPreviewDialog.
VB HELPER: TUTORIAL: ASCII CODES Tutorial: ASCII Codes Codes 0-127 Codes 128-255. Codes 0-127 VB HELPER: HOWTO: GET THE CURRENT USER'S NAME IN VISUAL Simply use the SystemInformation object's UserName property. Private Sub Form1_Load(ByVal sender As System.Object, ByVal _ e As System.EventArgs) Handles MyBase.Load lblUserName.Text = SystemInformation.UserName End Sub VB HELPER: HOWTO: UPLOAD AND DOWNLOAD FILES USING FTP Use the Internet Transfer Control. Subroutine AddMessage simply displays status messages to keep you informed of what's happening. When you click the Download button, cmdDownload_Click sets the control's URL, UserName, and Password properties in that order. VB HELPER: HOWTO: USE INTERFACE INHERITANCE BY USING THE Visual Basic 6 and earlier versions do not allow true inheritance. However, they allow interface inheritance where one class defines a public interface and then other classes implement it. VB HELPER: HOWTO: CONNECT AN ADO RECORDSET TO AN XML FILE Thanks to James Hansen.. First, create an XML file containing the data in ADO's saved XML format. When you click the "Make XML File" button, the program uses the following code to make such an XML file. VB HELPER: HOWTO: DRAW CONTOUR PLOTS (LEVEL CURVES) FOR A Draw contour plots (level curves) for a function with known derivatives in VB .NET. For each contour value: Start at a probe point. Follow the gradient until you find a point on the contour. Move perpendicular to the gradient to find the next probe point. Follow the gradient to find the next point on the contour. VB HELPER: HOWTO: SORT THE COLUMNS IN AN MSFLEXGRID CONTROL In the control's MouseUp event handler, use its MouseRow function to see if the user clicked in the first row. If this is the first row, call subroutine SortByColumn, passing it the column clicked. VB HELPER: HOWTO: CONVERT NUMBERS BETWEEN ROMAN AND ARABIC To convert from Roman to Arabic, convert each Roman digit into its numeric equivalent (I=1, V=5, X=10, L=50, C=100, D=500, M=1000). If this digit has value greater than the previous one, the combination represents a subtraction. VB HELPER: INDEX CATEGORIES Stephens' Visual Basic Programming 24-Hour Trainer: Stephens' C# Programming with Visual Studio 2010 24-Hour Trainer: Beginning Database Design Solutions VB HELPER: INDEX: VB.NET Title Keywords ; HowTo: Quickly read and write the contents of a text file in VB .NET: VB.NET, NET, text file, grab, read, write: HowTo: Use routines to easily read and write a file's contents in VB .NET VB HELPER: HOWTO: DRAW A MANDELBROT SET WITH SMOOTHLY You may not have heard that Benoît Mandelbrot (November 20, 1924 - October 14, 2010) recently passed away. In his honor, I decided to enhance the Mandelbrot set program shown in an earlier example. VB HELPER: HOWTO: CONVERT A CHARACTER TO AND FROM ITS Use Asc to get a character's ASCII code. Use Chr to convert an ASCII code into a character. Thanks to Adan Rivas: Private Sub Command2_Click() 'Code the character Label3 = Asc(Text1) 'clears text box Text1 = "" ' adds the coded character to textbox (label3) LABEL6 = LABEL6 + "," + Label3 ' set focus to textbox Text1.SetFocus 'decodes the coded character Text2 = Text2 + Chr(Label3) End Sub VB HELPER: HOWTO: CREATE A WORD DOCUMENT WITH SOME A Visual Basic program can open the Word application and use it as a server to manipulate Word documents. First open the Add Referencesdialog.
VB HELPER: HOWTO: MAKE A BOUNCING BALL ANIMATION IN VB .NET When the form loads, initialize the ball's position and direction vector .Turn on the form's DoubleBuffer style to reduce flicker. Private Const BALL_WID As Integer = 50 Private Const BALL_HGT As Integer = 50 Private m_Dx As Integer Private m_Dy As Integer Private m_X As Integer Private m_Y As Integer Private Sub Form1_Load(ByVal sender As System.Object, ByVal _ e As System.EventArgs) Handles VB HELPER: HOWTO: USE THE DOTNETZIP LIBRARY TO COMPRESS Title: Use the DotNetZip library to compress and decompress files in Visual Basic .NET: Description: This example shows how to use the DotNetZip library to compress and decompress files in Visual Basic.NET.
VB HELPER: HOWTO: PRINT AND DISPLAY PRINT PREVIEWS IN VB .NET Title: Print and display print previews in VB .NET: Description: This example shows how to print and display print previews in VB .NET. It shows how to use the PrintDocument object to print, how to print with the PrintDialog control, and how to display a print preview with thePrintPreviewDialog.
VB HELPER: HOWTO: SOLVE A SYSTEM OF EQUATIONS WITH Title: Solve a system of equations with Gaussian elimination in VB .NET: Description: This example shows how to solve a system of equations with Gaussian elimination in VB .NET. VB HELPER: HOWTO: CATCH UNHANDLED EXCEPTIONS IN VISUAL You can add an UnhandledException event handler that intercepts any exceptions that you have not already caught by using Try Catch blocks. This event handler is contained in the file ApplicationEvents.vb, which is normally hidden. VB HELPER: INDEX CATEGORIES Stephens' Visual Basic Programming 24-Hour Trainer: Stephens' C# Programming with Visual Studio 2010 24-Hour Trainer: Beginning Database Design Solutions VB HELPER: INDEX: VB.NET Title Keywords ; HowTo: Quickly read and write the contents of a text file in VB .NET: VB.NET, NET, text file, grab, read, write: HowTo: Use routines to easily read and write a file's contents in VB .NET VB HELPER: HOWTO: DRAW A MANDELBROT SET WITH SMOOTHLY You may not have heard that Benoît Mandelbrot (November 20, 1924 - October 14, 2010) recently passed away. In his honor, I decided to enhance the Mandelbrot set program shown in an earlier example. VB HELPER: HOWTO: CONVERT A CHARACTER TO AND FROM ITS Use Asc to get a character's ASCII code. Use Chr to convert an ASCII code into a character. Thanks to Adan Rivas: Private Sub Command2_Click() 'Code the character Label3 = Asc(Text1) 'clears text box Text1 = "" ' adds the coded character to textbox (label3) LABEL6 = LABEL6 + "," + Label3 ' set focus to textbox Text1.SetFocus 'decodes the coded character Text2 = Text2 + Chr(Label3) End Sub VB HELPER: HOWTO: CREATE A WORD DOCUMENT WITH SOME A Visual Basic program can open the Word application and use it as a server to manipulate Word documents. First open the Add Referencesdialog.
VB HELPER: HOWTO: MAKE A BOUNCING BALL ANIMATION IN VB .NET When the form loads, initialize the ball's position and direction vector .Turn on the form's DoubleBuffer style to reduce flicker. Private Const BALL_WID As Integer = 50 Private Const BALL_HGT As Integer = 50 Private m_Dx As Integer Private m_Dy As Integer Private m_X As Integer Private m_Y As Integer Private Sub Form1_Load(ByVal sender As System.Object, ByVal _ e As System.EventArgs) Handles VB HELPER: HOWTO: USE THE DOTNETZIP LIBRARY TO COMPRESS Title: Use the DotNetZip library to compress and decompress files in Visual Basic .NET: Description: This example shows how to use the DotNetZip library to compress and decompress files in Visual Basic.NET.
VB HELPER: HOWTO: PRINT AND DISPLAY PRINT PREVIEWS IN VB .NET Title: Print and display print previews in VB .NET: Description: This example shows how to print and display print previews in VB .NET. It shows how to use the PrintDocument object to print, how to print with the PrintDialog control, and how to display a print preview with thePrintPreviewDialog.
VB HELPER: HOWTO: SOLVE A SYSTEM OF EQUATIONS WITH Title: Solve a system of equations with Gaussian elimination in VB .NET: Description: This example shows how to solve a system of equations with Gaussian elimination in VB .NET. VB HELPER: HOWTO: CATCH UNHANDLED EXCEPTIONS IN VISUAL You can add an UnhandledException event handler that intercepts any exceptions that you have not already caught by using Try Catch blocks. This event handler is contained in the file ApplicationEvents.vb, which is normally hidden. VB HELPER: INDEX: VB.NET Title Keywords ; HowTo: Define a DataSet at design time in Visual Basic 2005: DataSet, design time, VB.NET, Visual Basic 2005: HowTo: Select random records from a database table in Visual Basic .NET VB HELPER: HOWTO: MAKE A SWIRL IN VISUAL BASIC .NET See Swirl by Eric W. Weisstein from MathWorld, a Wolfram Web Resource.. The program plots points in polar coordinates where the intensity of a point is given by: F(r, t) = Sin(6 * Cos(r) - n * t) Subroutine DrawSwirl draws the fractal. VB HELPER: HOWTO: CREATE A WORD DOCUMENT WITH SOME A Visual Basic program can open the Word application and use it as a server to manipulate Word documents. First open the Add Referencesdialog.
VB HELPER: HOWTO: CONNECT AN ADO RECORDSET TO AN XML FILE Thanks to James Hansen.. First, create an XML file containing the data in ADO's saved XML format. When you click the "Make XML File" button, the program uses the following code to make such an XML file. VB HELPER: HOWTO: ENCRYPT OR DECRYPT FILES IN VISUAL BASIC This example shows how to encrypt or decrypt files in Visual Basic .NET. The CryptFile method encrypts or decrypts a file into an output file at a fairly high level. The EncryptFile and DecryptFile methods simply call CryptFile. ' Encrypt or decrypt a file, saving the results in another ' file. Public Sub EncryptFile (ByVal password As String VB HELPER: HOWTO: CATCH UNHANDLED EXCEPTIONS IN VISUAL You can add an UnhandledException event handler that intercepts any exceptions that you have not already caught by using Try Catch blocks. This event handler is contained in the file ApplicationEvents.vb, which is normally hidden. VB HELPER: TUTORIAL: ASCII CODES Tutorial: ASCII Codes Codes 0-127 Codes 128-255. Codes 0-127 VB HELPER: HOWTO: USE A TABCONTROL WITH OWNER-DRAWN TABS To make an owner drawn tab control, the code sets the control's DrawMode property to OwnerDrawFixed. The SizeMode must be Fixed if the program needs to change the tab size. VB HELPER: HOWTO: SOLVE A SYSTEM OF EQUATIONS WITH Title: Solve a system of equations with Gaussian elimination in VB .NET: Description: This example shows how to solve a system of equations with Gaussian elimination in VB .NET. VB HELPER: HOWTO: CONVERT NUMBERS BETWEEN ROMAN AND ARABIC To convert from Roman to Arabic, convert each Roman digit into its numeric equivalent (I=1, V=5, X=10, L=50, C=100, D=500, M=1000). If this digit has value greater than the previous one, the combination represents a subtraction. VB HELPER: INDEX CATEGORIES Stephens' Visual Basic Programming 24-Hour Trainer: Stephens' C# Programming with Visual Studio 2010 24-Hour Trainer: Beginning Database Design Solutions VB HELPER: HOWTO: DRAW A MANDELBROT SET WITH SMOOTHLY You may not have heard that Benoît Mandelbrot (November 20, 1924 - October 14, 2010) recently passed away. In his honor, I decided to enhance the Mandelbrot set program shown in an earlier example. VB HELPER: HOWTO: CONVERT A CHARACTER TO AND FROM ITS Use Asc to get a character's ASCII code. Use Chr to convert an ASCII code into a character. Thanks to Adan Rivas: Private Sub Command2_Click() 'Code the character Label3 = Asc(Text1) 'clears text box Text1 = "" ' adds the coded character to textbox (label3) LABEL6 = LABEL6 + "," + Label3 ' set focus to textbox Text1.SetFocus 'decodes the coded character Text2 = Text2 + Chr(Label3) End Sub VB HELPER: HOWTO: CONNECT AN ADO RECORDSET TO AN XML FILE Thanks to James Hansen.. First, create an XML file containing the data in ADO's saved XML format. When you click the "Make XML File" button, the program uses the following code to make such an XML file. VB HELPER: HOWTO: USE INTERFACE INHERITANCE BY USING THE Visual Basic 6 and earlier versions do not allow true inheritance. However, they allow interface inheritance where one class defines a public interface and then other classes implement it. VB HELPER: HOWTO: USE THE DOTNETZIP LIBRARY TO COMPRESS Title: Use the DotNetZip library to compress and decompress files in Visual Basic .NET: Description: This example shows how to use the DotNetZip library to compress and decompress files in Visual Basic.NET.
VB HELPER: HOWTO: SOLVE A SYSTEM OF EQUATIONS WITH Title: Solve a system of equations with Gaussian elimination in VB .NET: Description: This example shows how to solve a system of equations with Gaussian elimination in VB .NET. VB HELPER: HOWTO: MAKE A BOUNCING BALL ANIMATION IN VB .NET When the form loads, initialize the ball's position and direction vector .Turn on the form's DoubleBuffer style to reduce flicker. Private Const BALL_WID As Integer = 50 Private Const BALL_HGT As Integer = 50 Private m_Dx As Integer Private m_Dy As Integer Private m_X As Integer Private m_Y As Integer Private Sub Form1_Load(ByVal sender As System.Object, ByVal _ e As System.EventArgs) Handles VB HELPER: HOWTO: PRINT AND DISPLAY PRINT PREVIEWS IN VB .NET Title: Print and display print previews in VB .NET: Description: This example shows how to print and display print previews in VB .NET. It shows how to use the PrintDocument object to print, how to print with the PrintDialog control, and how to display a print preview with thePrintPreviewDialog.
VB HELPER: HOWTO: COPY A DIRECTORY, ITS SUBDIRECTORIES And fname ".." Then files_copied = files_copied + 1 ' See if the file is a directory. If file_data.dwFileAttributes And _ DDL_DIRECTORY Then ' This is a directory. ' Make the new directory. MkDir to_dir & fname ' Save the directory name so ' we can search it later. dirs.Add fname Else ' This is not a directory. ' Copy the file. VB HELPER: INDEX CATEGORIES Stephens' Visual Basic Programming 24-Hour Trainer: Stephens' C# Programming with Visual Studio 2010 24-Hour Trainer: Beginning Database Design Solutions VB HELPER: HOWTO: DRAW A MANDELBROT SET WITH SMOOTHLY You may not have heard that Benoît Mandelbrot (November 20, 1924 - October 14, 2010) recently passed away. In his honor, I decided to enhance the Mandelbrot set program shown in an earlier example. VB HELPER: HOWTO: CONVERT A CHARACTER TO AND FROM ITS Use Asc to get a character's ASCII code. Use Chr to convert an ASCII code into a character. Thanks to Adan Rivas: Private Sub Command2_Click() 'Code the character Label3 = Asc(Text1) 'clears text box Text1 = "" ' adds the coded character to textbox (label3) LABEL6 = LABEL6 + "," + Label3 ' set focus to textbox Text1.SetFocus 'decodes the coded character Text2 = Text2 + Chr(Label3) End Sub VB HELPER: HOWTO: CONNECT AN ADO RECORDSET TO AN XML FILE Thanks to James Hansen.. First, create an XML file containing the data in ADO's saved XML format. When you click the "Make XML File" button, the program uses the following code to make such an XML file. VB HELPER: HOWTO: USE INTERFACE INHERITANCE BY USING THE Visual Basic 6 and earlier versions do not allow true inheritance. However, they allow interface inheritance where one class defines a public interface and then other classes implement it. VB HELPER: HOWTO: USE THE DOTNETZIP LIBRARY TO COMPRESS Title: Use the DotNetZip library to compress and decompress files in Visual Basic .NET: Description: This example shows how to use the DotNetZip library to compress and decompress files in Visual Basic.NET.
VB HELPER: HOWTO: SOLVE A SYSTEM OF EQUATIONS WITH Title: Solve a system of equations with Gaussian elimination in VB .NET: Description: This example shows how to solve a system of equations with Gaussian elimination in VB .NET. VB HELPER: HOWTO: MAKE A BOUNCING BALL ANIMATION IN VB .NET When the form loads, initialize the ball's position and direction vector .Turn on the form's DoubleBuffer style to reduce flicker. Private Const BALL_WID As Integer = 50 Private Const BALL_HGT As Integer = 50 Private m_Dx As Integer Private m_Dy As Integer Private m_X As Integer Private m_Y As Integer Private Sub Form1_Load(ByVal sender As System.Object, ByVal _ e As System.EventArgs) Handles VB HELPER: HOWTO: PRINT AND DISPLAY PRINT PREVIEWS IN VB .NET Title: Print and display print previews in VB .NET: Description: This example shows how to print and display print previews in VB .NET. It shows how to use the PrintDocument object to print, how to print with the PrintDialog control, and how to display a print preview with thePrintPreviewDialog.
VB HELPER: HOWTO: COPY A DIRECTORY, ITS SUBDIRECTORIES And fname ".." Then files_copied = files_copied + 1 ' See if the file is a directory. If file_data.dwFileAttributes And _ DDL_DIRECTORY Then ' This is a directory. ' Make the new directory. MkDir to_dir & fname ' Save the directory name so ' we can search it later. dirs.Add fname Else ' This is not a directory. ' Copy the file. VB HELPER: HOWTO: USE A TABCONTROL WITH OWNER-DRAWN TABS To make an owner drawn tab control, the code sets the control's DrawMode property to OwnerDrawFixed. The SizeMode must be Fixed if the program needs to change the tab size. VB HELPER: HOWTO: CREATE A WORD DOCUMENT WITH SOME A Visual Basic program can open the Word application and use it as a server to manipulate Word documents. First open the Add Referencesdialog.
VB HELPER: HOWTO: USE THE DOTNETZIP LIBRARY TO COMPRESS Title: Use the DotNetZip library to compress and decompress files in Visual Basic .NET: Description: This example shows how to use the DotNetZip library to compress and decompress files in Visual Basic.NET.
VB HELPER: HOWTO: DRAW A FRACTAL MANDELBROT SET IN VB.NET The Mandelbrot set uses an iterated equation to calculate colors for the points in a region. The equation is: Z(n) = Z(n-1)^2 + C. Here the Z(n) and C are complex numbers. VB HELPER: HOWTO: UPLOAD AND DOWNLOAD FILES USING FTP Use the Internet Transfer Control. Subroutine AddMessage simply displays status messages to keep you informed of what's happening. When you click the Download button, cmdDownload_Click sets the control's URL, UserName, and Password properties in that order. VB HELPER: HOWTO: SEE IF A DIRECTORY EXISTS IN VB .NET The System.IO.Directory.Exists method returns True if a file exists. Private Sub Form1_Load(ByVal sender As System.Object, ByVal _ e As System.EventArgs) Handles MyBase.Load Dim dir_name As String = Application.StartupPath If System.IO.Directory.Exists(dir_name) Then lblDir1.Text = dir_name & " exists" Else lblDir1.Text = dir_name & " does not exist" End If dir_name = dir_name.Substring(0 VB HELPER: HOWTO: DRAW CONTOUR PLOTS (LEVEL CURVES) FOR A Draw contour plots (level curves) for a function with known derivatives in VB .NET. For each contour value: Start at a probe point. Follow the gradient until you find a point on the contour. Move perpendicular to the gradient to find the next probe point. Follow the gradient to find the next point on the contour. VB HELPER: HOWTO: CONVERT A NUMBER INTO WORDS Examine the number three digits at a time. Translate each three-digit group into words and add the appropriate ending as in "twenty twothousand."
VB HELPER: HOWTO: DRAW A SIMPLE HISTOGRAM IN VB .NET When the program loads, it generates some random data. Private Const MIN_VALUE As Single = 0 Private Const MAX_VALUE As Single = 100 Private m_DataValues(9) As Single Private Sub Form1_Load(ByVal sender As System.Object, ByVal _ e As System.EventArgs) Handles MyBase.Load Dim rnd As New Random ' Create data. For i As Integer = 0 To m_DataValues.GetUpperBound(0) m_DataValues(i) = VB HELPER: HOWTO: ROUND A VALUE TO A SPECIFIED NUMBER OF Robert Heinig says: Dangerous. Revise and explain that CInt coerces a value to 16bit signed. CLng is the better choice in most cases anyway, but you still have to ensure the input values stay within 2^31 VB HELPER: INDEX CATEGORIES Stephens' Visual Basic Programming 24-Hour Trainer: Stephens' C# Programming with Visual Studio 2010 24-Hour Trainer: Beginning Database Design Solutions VB HELPER: HOWTO: DRAW A MANDELBROT SET WITH SMOOTHLY You may not have heard that Benoît Mandelbrot (November 20, 1924 - October 14, 2010) recently passed away. In his honor, I decided to enhance the Mandelbrot set program shown in an earlier example. VB HELPER: HOWTO: CONVERT A CHARACTER TO AND FROM ITS Use Asc to get a character's ASCII code. Use Chr to convert an ASCII code into a character. Thanks to Adan Rivas: Private Sub Command2_Click() 'Code the character Label3 = Asc(Text1) 'clears text box Text1 = "" ' adds the coded character to textbox (label3) LABEL6 = LABEL6 + "," + Label3 ' set focus to textbox Text1.SetFocus 'decodes the coded character Text2 = Text2 + Chr(Label3) End Sub VB HELPER: HOWTO: USE INTERFACE INHERITANCE BY USING THE Visual Basic 6 and earlier versions do not allow true inheritance. However, they allow interface inheritance where one class defines a public interface and then other classes implement it. VB HELPER: HOWTO: CONNECT AN ADO RECORDSET TO AN XML FILE Thanks to James Hansen.. First, create an XML file containing the data in ADO's saved XML format. When you click the "Make XML File" button, the program uses the following code to make such an XML file. VB HELPER: HOWTO: USE THE DOTNETZIP LIBRARY TO COMPRESS Title: Use the DotNetZip library to compress and decompress files in Visual Basic .NET: Description: This example shows how to use the DotNetZip library to compress and decompress files in Visual Basic.NET.
VB HELPER: HOWTO: SOLVE A SYSTEM OF EQUATIONS WITH Title: Solve a system of equations with Gaussian elimination in VB .NET: Description: This example shows how to solve a system of equations with Gaussian elimination in VB .NET. VB HELPER: HOWTO: USE A TABCONTROL WITH OWNER-DRAWN TABS To make an owner drawn tab control, the code sets the control's DrawMode property to OwnerDrawFixed. The SizeMode must be Fixed if the program needs to change the tab size. VB HELPER: HOWTO: COPY A DIRECTORY, ITS SUBDIRECTORIES And fname ".." Then files_copied = files_copied + 1 ' See if the file is a directory. If file_data.dwFileAttributes And _ DDL_DIRECTORY Then ' This is a directory. ' Make the new directory. MkDir to_dir & fname ' Save the directory name so ' we can search it later. dirs.Add fname Else ' This is not a directory. ' Copy the file. VB HELPER: HOWTO: PRINT AND DISPLAY PRINT PREVIEWS IN VB .NET Title: Print and display print previews in VB .NET: Description: This example shows how to print and display print previews in VB .NET. It shows how to use the PrintDocument object to print, how to print with the PrintDialog control, and how to display a print preview with thePrintPreviewDialog.
VB HELPER: INDEX CATEGORIES Stephens' Visual Basic Programming 24-Hour Trainer: Stephens' C# Programming with Visual Studio 2010 24-Hour Trainer: Beginning Database Design Solutions VB HELPER: HOWTO: DRAW A MANDELBROT SET WITH SMOOTHLY You may not have heard that Benoît Mandelbrot (November 20, 1924 - October 14, 2010) recently passed away. In his honor, I decided to enhance the Mandelbrot set program shown in an earlier example. VB HELPER: HOWTO: CONVERT A CHARACTER TO AND FROM ITS Use Asc to get a character's ASCII code. Use Chr to convert an ASCII code into a character. Thanks to Adan Rivas: Private Sub Command2_Click() 'Code the character Label3 = Asc(Text1) 'clears text box Text1 = "" ' adds the coded character to textbox (label3) LABEL6 = LABEL6 + "," + Label3 ' set focus to textbox Text1.SetFocus 'decodes the coded character Text2 = Text2 + Chr(Label3) End Sub VB HELPER: HOWTO: USE INTERFACE INHERITANCE BY USING THE Visual Basic 6 and earlier versions do not allow true inheritance. However, they allow interface inheritance where one class defines a public interface and then other classes implement it. VB HELPER: HOWTO: CONNECT AN ADO RECORDSET TO AN XML FILE Thanks to James Hansen.. First, create an XML file containing the data in ADO's saved XML format. When you click the "Make XML File" button, the program uses the following code to make such an XML file. VB HELPER: HOWTO: USE THE DOTNETZIP LIBRARY TO COMPRESS Title: Use the DotNetZip library to compress and decompress files in Visual Basic .NET: Description: This example shows how to use the DotNetZip library to compress and decompress files in Visual Basic.NET.
VB HELPER: HOWTO: SOLVE A SYSTEM OF EQUATIONS WITH Title: Solve a system of equations with Gaussian elimination in VB .NET: Description: This example shows how to solve a system of equations with Gaussian elimination in VB .NET. VB HELPER: HOWTO: USE A TABCONTROL WITH OWNER-DRAWN TABS To make an owner drawn tab control, the code sets the control's DrawMode property to OwnerDrawFixed. The SizeMode must be Fixed if the program needs to change the tab size. VB HELPER: HOWTO: COPY A DIRECTORY, ITS SUBDIRECTORIES And fname ".." Then files_copied = files_copied + 1 ' See if the file is a directory. If file_data.dwFileAttributes And _ DDL_DIRECTORY Then ' This is a directory. ' Make the new directory. MkDir to_dir & fname ' Save the directory name so ' we can search it later. dirs.Add fname Else ' This is not a directory. ' Copy the file. VB HELPER: HOWTO: PRINT AND DISPLAY PRINT PREVIEWS IN VB .NET Title: Print and display print previews in VB .NET: Description: This example shows how to print and display print previews in VB .NET. It shows how to use the PrintDocument object to print, how to print with the PrintDialog control, and how to display a print preview with thePrintPreviewDialog.
VB HELPER: HOWTO: MAKE TWO VISUAL BASIC PROGRAM EXCHANGE First, make a DDE source program. Set the form's LinkMode property to 1 - Source. Put a TextBox on the form. Compile it into an executable. That's all you need to do with the source. VB HELPER: HOWTO: USE A TABCONTROL WITH OWNER-DRAWN TABS To make an owner drawn tab control, the code sets the control's DrawMode property to OwnerDrawFixed. The SizeMode must be Fixed if the program needs to change the tab size. VB HELPER: HOWTO: USE THE DOTNETZIP LIBRARY TO COMPRESS Title: Use the DotNetZip library to compress and decompress files in Visual Basic .NET: Description: This example shows how to use the DotNetZip library to compress and decompress files in Visual Basic.NET.
VB HELPER: HOWTO: CREATE A WORD DOCUMENT WITH SOME Title: Create a Word document with some formatting in Visual Basic .NET: Description: This example shows how to create a Word document with some formatting in Visual Basic .NET. VB HELPER: HOWTO: PRINT AND DISPLAY PRINT PREVIEWS IN VB .NET Title: Print and display print previews in VB .NET: Description: This example shows how to print and display print previews in VB .NET. It shows how to use the PrintDocument object to print, how to print with the PrintDialog control, and how to display a print preview with thePrintPreviewDialog.
VB HELPER: TUTORIAL: SCREEN SCRAPING ' Now we use the object's "text" property, ' and a string function: strCustomerName = Mid(Mainframe.text, position-on-screen, FieldLength) ' If there are 80 characters per line and ' your field begins in the third position of ' the second line, position-on-screen is 83. ' FieldLength is the number of ' characters you need to capture. ' Output file gets result Print #2, strCustomerNumber VB HELPER: HOWTO: SEE IF A DIRECTORY EXISTS IN VB .NET The System.IO.Directory.Exists method returns True if a file exists. Private Sub Form1_Load(ByVal sender As System.Object, ByVal _ e As System.EventArgs) Handles MyBase.Load Dim dir_name As String = Application.StartupPath If System.IO.Directory.Exists(dir_name) Then lblDir1.Text = dir_name & " exists" Else lblDir1.Text = dir_name & " does not exist" End If dir_name = dir_name.Substring(0 VB HELPER: HOWTO: CONVERT A NUMBER INTO WORDS Examine the number three digits at a time. Translate each three-digit group into words and add the appropriate ending as in "twenty twothousand."
VB HELPER: HOWTO: ROUND A VALUE TO A SPECIFIED NUMBER OF Robert Heinig says: Dangerous. Revise and explain that CInt coerces a value to 16bit signed. CLng is the better choice in most cases anyway, but you still have to ensure the input values stay within 2^31 VB HELPER: HOWTO: DRAW A SIMPLE HISTOGRAM IN VB .NET When the program loads, it generates some random data. Private Const MIN_VALUE As Single = 0 Private Const MAX_VALUE As Single = 100 Private m_DataValues(9) As Single Private Sub Form1_Load(ByVal sender As System.Object, ByVal _ e As System.EventArgs) Handles MyBase.Load Dim rnd As New Random ' Create data. For i As Integer = 0 To m_DataValues.GetUpperBound(0) m_DataValues(i) =HOME
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MSDN Visual Basic Community TIPS, TRICKS, & EXAMPLE PROGRAMS FOR VISUAL BASIC DEVELOPERS NOW AVAILABLE! VISUAL BASIC 2008 PROGRAMMER'S REFERENCE This revised and updated tutorial and reference will help you quickly get up to speed on the latest features in Visual Basic 2008. The tutorial section walks you through VB.NET from scratch, providing you with in-depth descriptions of the development environment, basic program syntax, and standard controls. It also explores fundamental concepts in object-oriented programming with VB. The comprehensive reference section provides easy-to-use summaries of key Visual Basic syntax and techniques. The appendexes let you quickly fill in the details when you know what you want to do but don't remember the exact syntax. THIS EDITION PROVIDES FULL COVERAGE OF NEW VISUAL BASIC FEATURESINCLUDING:
LINQ
Extension Methods
Anonymous Types
Object Initializers
Lambda or Inline FunctionsPartial Methods
Relaxed Delegates
If Function
Nullable Types
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Improved .NET Framework WHAT YOU WILL LEARN FROM THIS BOOK: * Extension methods for adding new features to existing classes * How to select and use Windows Forms Controls for a specific purpose * Tips for using subroutines and functions to break a program intomanageable pieces
* Techniques for error handling and debugging * Various important classes and objects to use when building anapplication
* How to use the graphics device interface routines to draw images inVB
* Ways an application interacts with its environment Copyright © 1997-2008 Rocky Mountain Computer Consulting, Inc. All rights reserved. https://vb-helper.com/ Updated 05/09/2019 20:04:29Details
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