调用如下,
Private Sub Command1_Click()
'忽略错误继续执行下一句语句
On Error Resume Next
'获取图片框1里的信息以图片形式入在图片框4里
Set Picture4.Picture = CapturePictureBox(Picture1)
'显示保存对话框
CommonDialog1.ShowSave
'保存图片
SavePicture Picture4.Picture, CommonDialog1.FileName
'同上
Set Picture4.Picture = CapturePictureBox(Picture2)
CommonDialog1.ShowSave
SavePicture Picture4.Picture, CommonDialog1.FileName
'同上
Set Picture4.Picture = CapturePictureBox(Picture3)
CommonDialog1.ShowSave
SavePicture Picture4.Picture, CommonDialog1.FileName
End Sub
模块内容:
'要求变量声明
Option Explicit
'声明数组下标
Option Base 0
'本模块用来拷屏创建图片
Public Type PALETTEENTRY
peRed As Byte
peGreen As Byte
peBlue As Byte
peFlags As Byte
End Type
Public Type LOGPALETTE
palVersion As Integer
palNumEntries As Integer
palPalEntry(255) As PALETTEENTRY
End Type
Public Type GUID
Data1 As Long
Data2 As Integer
Data3 As Integer
Data4(7) As Byte
End Type
Public Const RASTERCAPS As Long = 38
Public Const RC_PALETTE As Long = &H100
Public Const SIZEPALETTE As Long = 104
Public Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type
Public Declare Function CreateCompatibleDC Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function CreateCompatibleBitmap Lib "GDI32" (ByVal hDC As Long, ByVal nWidth As Long, ByVal nHeight As Long) As Long
Public Declare Function GetDeviceCaps Lib "GDI32" (ByVal hDC As Long, ByVal iCapabilitiy As Long) As Long
Public Declare Function GetSystemPaletteEntries Lib "GDI32" (ByVal hDC As Long, ByVal wStartIndex As Long, ByVal wNumEntries As Long, lpPaletteEntries As PALETTEENTRY) As Long
Public Declare Function CreatePalette Lib "GDI32" (lpLogPalette As LOGPALETTE) As Long
Public Declare Function SelectObject Lib "GDI32" (ByVal hDC As Long, ByVal hObject As Long) As Long
Public 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 Long
Public Declare Function DeleteDC Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function GetForegroundWindow Lib "USER32" () As Long
Public Declare Function SelectPalette Lib "GDI32" (ByVal hDC As Long, ByVal hPalette As Long, ByVal bForceBackground As Long) As Long
Public Declare Function RealizePalette Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function GetWindowDC Lib "USER32" (ByVal hWnd As Long) As Long
Public Declare Function GetDC Lib "USER32" (ByVal hWnd As Long) As Long
Public Declare Function GetWindowRect Lib "USER32" (ByVal hWnd As Long, lpRect As RECT) As Long
Public Declare Function ReleaseDC Lib "USER32" (ByVal hWnd As Long, ByVal hDC As Long) As Long
Public Declare Function GetDesktopWindow Lib "USER32" () As Long
Public Type PicBmp
Size As Long
Type As Long
hBmp As Long
hPal As Long
Reserved As Long
End Type
Public Declare Function OleCreatePictureIndirect Lib "olepro32.dll" (PicDesc As PicBmp, RefIID As GUID, ByVal fPictureOwnsHandle As Long, IPic As IPicture) As Long
'以图片框内容创建一幅图片
Public Function CapturePictureBox(PicBox As PictureBox) As Picture
Set CapturePictureBox = CaptureWindow(PicBox.hWnd, False, 0, 0, PicBox.ScaleX(PicBox.Width, vbTwips, vbPixels), PicBox.ScaleY(PicBox.Height, vbTwips, vbPixels))
End Function
Public 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
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
借助另一个 PictureBox:
Public Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long