Option ExplicitPrivate Type PALETTEENTRY peRed As Byte peGreen As Byte peBlue As Byte peFlags As ByteEnd TypePrivate Type LOGPALETTE palVersion As Integer palNumEntries As Integer palPalEntry(255) As PALETTEENTRYEnd TypePrivate Type GUID Data1 As Long Data2 As Integer Data3 As Integer Data4(7) As ByteEnd TypePrivate Const RASTERCAPS As Long = 38Private Const RC_PALETTE As Long = &H100Private Const SIZEPALETTE As Long = 104Private Type RECT Left As Long Top As Long Right As Long Bottom As LongEnd TypePrivate Type PicBmp Size As Long Type As Long hBmp As Long hPal As Long Reserved As LongEnd TypePrivate Declare Function CreateCompatibleDC Lib "GDI32" (ByVal hDC As Long) As LongPrivate Declare Function CreateCompatibleBitmap Lib "GDI32" (ByVal hDC As Long, ByVal nWidth As Long, ByVal nHeight As Long) As LongPrivate Declare Function GetDeviceCaps Lib "GDI32" (ByVal hDC As Long, ByVal iCapabilitiy As Long) As LongPrivate Declare Function GetSystemPaletteEntries Lib "GDI32" (ByVal hDC As Long, ByVal wStartIndex As Long, ByVal wNumEntries As Long, lpPaletteEntries As PALETTEENTRY) As LongPrivate Declare Function CreatePalette Lib "GDI32" (lpLogPalette As LOGPALETTE) As LongPrivate Declare Function SelectObject Lib "GDI32" (ByVal hDC As Long, ByVal hObject As Long) As LongPrivate Declare Function BitBlt Lib "GDI32" (ByVal hDCDest As Long, ByVal XDest As Long, ByVal YDest As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hDCSrc As Long, ByVal XSrc As Long, ByVal YSrc As Long, ByVal dwRop As Long) As LongPrivate Declare Function DeleteDC Lib "GDI32" (ByVal hDC As Long) As LongPrivate Declare Function GetForegroundWindow Lib "USER32" () As LongPrivate Declare Function SelectPalette Lib "GDI32" (ByVal hDC As Long, ByVal hPalette As Long, ByVal bForceBackground As Long) As LongPrivate Declare Function RealizePalette Lib "GDI32" (ByVal hDC As Long) As LongPrivate Declare Function GetWindowDC Lib "USER32" (ByVal hWnd As Long) As LongPrivate Declare Function GetDC Lib "USER32" (ByVal hWnd As Long) As LongPrivate Declare Function GetWindowRect Lib "USER32" (ByVal hWnd As Long, lpRect As RECT) As LongPrivate Declare Function ReleaseDC Lib "USER32" (ByVal hWnd As Long, ByVal hDC As Long) As LongPrivate Declare Function GetDesktopWindow Lib "USER32" () As LongPrivate Declare Function OleCreatePictureIndirect Lib "olepro32.dll" (PicDesc As PicBmp, RefIID As GUID, ByVal fPictureOwnsHandle As Long, IPic As IPicture) As LongPrivate Function CreateBitmapPicture(ByVal hBmp As Long, ByVal hPal As Long) As Picture Dim r As Long Dim Pic As PicBmp Dim IPic As IPicture Dim IID_IDispatch As GUID With IID_IDispatch .Data1 = &H20400 .Data4(0) = &HC0 .Data4(7) = &H46 End With With Pic .Size = Len(Pic) .Type = vbPicTypeBitmap .hBmp = hBmp .hPal = hPal End With r = OleCreatePictureIndirect(Pic, IID_IDispatch, 1, IPic) Set CreateBitmapPicture = IPic

End FunctionPrivate Function CaptureWindow(ByVal hWndSrc As Long, ByVal Client As Boolean, ByVal LeftSrc As Long, ByVal TopSrc As Long, ByVal WidthSrc As Long, ByVal HeightSrc As Long) As Picture Dim hDCMemory As Long Dim hBmp As Long Dim hBmpPrev As Long Dim r As Long Dim hDCSrc As Long Dim hPal As Long Dim hPalPrev As Long Dim RasterCapsScrn As Long Dim HasPaletteScrn As Long Dim PaletteSizeScrn As Long Dim LogPal As LOGPALETTE If Client Then hDCSrc = GetDC(hWndSrc) Else hDCSrc = GetWindowDC(hWndSrc) End If hDCMemory = CreateCompatibleDC(hDCSrc) hBmp = CreateCompatibleBitmap(hDCSrc, WidthSrc, HeightSrc) hBmpPrev = SelectObject(hDCMemory, hBmp) RasterCapsScrn = GetDeviceCaps(hDCSrc, RASTERCAPS) HasPaletteScrn = RasterCapsScrn And RC_PALETTE PaletteSizeScrn = GetDeviceCaps(hDCSrc, SIZEPALETTE) If HasPaletteScrn And (PaletteSizeScrn = 256) Then LogPal.palVersion = &H300 LogPal.palNumEntries = 256 r = GetSystemPaletteEntries(hDCSrc, 0, 256, LogPal.palPalEntry(0)) hPal = CreatePalette(LogPal) hPalPrev = SelectPalette(hDCMemory, hPal, 0) r = RealizePalette(hDCMemory) End If r = BitBlt(hDCMemory, 0, 0, WidthSrc, HeightSrc, hDCSrc, LeftSrc, TopSrc, vbSrcCopy) hBmp = SelectObject(hDCMemory, hBmpPrev) If HasPaletteScrn And (PaletteSizeScrn = 256) Then hPal = SelectPalette(hDCMemory, hPalPrev, 0) End If r = DeleteDC(hDCMemory) r = ReleaseDC(hWndSrc, hDCSrc) Set CaptureWindow = CreateBitmapPicture(hBmp, hPal)End FunctionPublic Function CaptureScreen() As Picture Dim hWndScreen As Long hWndScreen = GetDesktopWindow() Set CaptureScreen = CaptureWindow(hWndScreen, False, 0, 0, Screen.Width \ Screen.TwipsPerPixelX, Screen.Height \ Screen.TwipsPerPixelY)End FunctionPublic Function CaptureClient(frmSrc As Form) As Picture Set CaptureClient = CaptureWindow(frmSrc.hWnd, True, 0, 0, frmSrc.ScaleX(frmSrc.ScaleWidth, frmSrc.ScaleMode, vbPixels), frmSrc.ScaleY(frmSrc.ScaleHeight, frmSrc.ScaleMode, vbPixels))End FunctionPrivate Sub cmdClear_Click() imgShow.Picture = LoadPicture() '赋值不带参数的 LoadPicture 将清除窗体、图片框及图象控件中的图形。End SubPrivate Sub cmdFullScreen_Click() Set imgShow.Picture = CaptureScreen()End SubPrivate Sub cmdSave_Click() dlgSave.DefaultExt = ".BMP" dlgSave.Filter = "Bitmap Image (*.bmp)|*.bmp" dlgSave.ShowSave If dlgSave.FileName <> "" Then SavePicture imgShow.Picture, dlgSave.FileName End IfEnd SubPrivate Sub cmdUser_Click() Set imgShow.Picture = CaptureClient(Me)End SubPrivate Sub Form_Load() imgShow.Stretch = True imgShow.BorderStyle = 1End Sub