Screen Capture Class Module

This module will allow you to easily save screen captures. You can specify wether you want to capture the entire screen or just the active window. I've included a copy of the class module for download (since PSC doesn't do that good of a job at formating the code). Any comments or suggestions are welcome.

Original Author: unknown

Code

Option Explicit Private Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Long, ByVal dwExtraInfo As Long) Private Declare Function MapVirtualKey Lib "user32" Alias "MapVirtualKeyA" (ByVal wCode As Long, ByVal wMapType As Long) As Long Private Declare Function GetVersionEx& Lib "kernel32" Alias "GetVersionExA" (lpVersionInformation As OSVERSIONINFO) Private Const VK_MENU = &H12 Private Const VK_SNAPSHOT = &H2C Private Const KEYEVENTF_KEYUP = &H2 ' used for dwPlatformId Private Const VER_PLATFORM_WIN32s = 0 Private Const VER_PLATFORM_WIN32_WINDOWS = 1 Private Const VER_PLATFORM_WIN32_NT = 2 Private Type OSVERSIONINFO ' 148 Bytes dwOSVersionInfoSize As Long dwMajorVersion As Long dwMinorVersion As Long dwBuildNumber As Long dwPlatformId As Long szCSDVersion As String * 128 End Type Public Function SaveScreenToFile(ByVal strFile As String, Optional EntireScreen As Boolean = True) As Boolean




Dim altscan%

Dim snapparam%

Dim ret&, IsWin95 As Boolean

Dim verInfo As OSVERSIONINFO


 

 On Error GoTo errHand

 

 'Check if the File Exist

 If Dir(strFile) <> "" Then

 Kill strFile

 'Exit Function

 End If

 

 altscan% = MapVirtualKey(VK_MENU, 0)

 If EntireScreen = False Then

 keybd_event VK_MENU, altscan, 0, 0

 ' It seems necessary to let this key get processed before

 ' taking the snapshot.

 End If

 

 verInfo.dwOSVersionInfoSize = 148

 ret = GetVersionEx(verInfo)

 If verInfo.dwPlatformId = VER_PLATFORM_WIN32_WINDOWS Then

 IsWin95 = True

 Else

 IsWin95 = False

 End If

 

 If EntireScreen = True And IsWin95 Then snapparam = 1

 

 DoEvents ' These seem necessary to make it reliable

 

 ' Take the snapshot

 keybd_event VK_SNAPSHOT, snapparam, 0, 0

 

 DoEvents

 

 If EntireScreen = False Then keybd_event VK_MENU, altscan, KEYEVENTF_KEYUP, 0

 

 SavePicture Clipboard.GetData(vbCFBitmap), strFile

 

 SaveScreenToFile = True

 

 Exit Function

 

 errHand:

 

 'Error handling

 SaveScreenToFile = False

End Function

About this post

Posted: 2002-06-01
By: ArchiveBot
Viewed: 92 times

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