Этот код сделает снимок экрана из окна или всего рабочего стола (виртуальный экран) и перетянет его в пользовательскую коробку с картинками.
Private Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type
Private Declare Function GetSystemMetrics Lib "user32" (ByVal nIndex As Long) As Long
Private Declare Function GetWindowRect Lib "user32" (ByVal hWnd As Long, lpRect As RECT) As Long
Private Declare Function GetDesktopWindow Lib "user32" () As Long
Private Declare Function GetWindowDC Lib "user32" (ByVal hWnd As Long) As Long
Private Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal X As Long, ByVal Y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long
Private Declare Function ReleaseDC Lib "user32" (ByVal hWnd As Long, ByVal hDC As Long) As Long
Private Const SM_XVIRTUALSCREEN = 76
Private Const SM_YVIRTUALSCREEN = 77
Private Const SM_CYVIRTUALSCREEN = 79
Private Const SM_CXVIRTUALSCREEN = 78
Private Sub GetScreenshot(Optional ByVal hWnd As Long = 0)
Dim hDC As Long
Dim WindowRect As RECT
Dim Left As Long
Dim Top As Long
Dim Width As Long
Dim Height As Long
If hWnd = 0 Then
'Get the DC of the desktop
hDC = GetWindowDC(GetDesktopWindow)
'Get the virtual screen coordinates (this handles multiple monitors too :)
Left = GetSystemMetrics(SM_XVIRTUALSCREEN)
Top = GetSystemMetrics(SM_YVIRTUALSCREEN)
Width = GetSystemMetrics(SM_CXVIRTUALSCREEN)
Height = GetSystemMetrics(SM_CYVIRTUALSCREEN)
Else
'Get the DC of the window we want to capture
hDC = GetWindowDC(hWnd)
'Get the window coordinates
GetWindowRect hWnd, WindowRect
Left = 0
Top = 0
Width = WindowRect.Right - WindowRect.Left
Height = WindowRect.Bottom - WindowRect.Top
End If
'BitBlt into our own DC
BitBlt picScreen.hDC, 0, 0, Width, Height, hDC, Left, Top, vbSrcCopy
'Delete our reference to the windows's DC
ReleaseDC hWnd, hDC
End Function
Обратите внимание на использование GetSystemMetrics()
при захвате рабочего стола. Это позволяет получить полные размеры экрана виртуального экрана при использовании нескольких мониторов вместо только основного монитора .