曾经尝试过,未果
GetWindowDC得到的是显示设备场景上的句柄,所以遮掉就不行了不太清楚gdi是怎么把窗体画在设备场景上的,如果能重定位到想要的地方就好办了,(linux下就可以这样做)
GetWindowDC得到的是显示设备场景上的句柄,所以遮掉就不行了不太清楚gdi是怎么把窗体画在设备场景上的,如果能重定位到想要的地方就好办了,(linux下就可以这样做)
解决方案 »
- VB不使用时间控件如何获取鼠标所在位置和点击状态?
- 再问Textbox(100分)
- 如何用ShellExecute像winrar点击右键那样直接解压文件?
- mshflexgrid水平滚动条的控制
- 500分求mftpx.ocx的注册码
- 如何用WINSOCK控件实现如IE的表单填写发送和接受功能
- 如何判断是用户关闭了我的程序,还是系统关机的时候结束了我的程序?
- ◆请问有什么好办法同时调用 若干个 URLDownloadToFile 下载不同的页面
- ■■■■我想用a程序将b程序的某一按钮从不可用(灰色)变为可用状态或可用变为不可用(灰色),我知要用api,谁有这样的代码?exe也行
- 如何在DataGrid中选中一条记录,然后用程序将其在数据库中删除
- 大家,谁知道spread.....?
- WinXP竟是由Basic写成
HOWTO: Capture and Print the Screen, a Form, or Any Window (Q161299)
http://support.microsoft.com/default.aspx?scid=kb;EN-US;Q161299 - 微软全球技术中心 VB技术支持本贴子以“现状”提供且没有任何担保,同时也没有授予任何权利。具体事项可参见使用条款(http://support.microsoft.com/directory/worldwide/zh-cn/community/terms_chs.asp)。为了为您创建更好的讨论环境,请参加我们的用户满意度调查(http://support.microsoft.com/directory/worldwide/zh-cn/community/survey.asp?key=(S,49854782))。
bitblt
picturebox.autodraw=true
Private Type PALETTEENTRY
peRed As Byte
peGreen As Byte
peBlue As Byte
peFlags As Byte
End TypePrivate Type LOGPALETTE
palVersion As Integer
palNumEntries As Integer
palPalEntry(255) As PALETTEENTRY
End Type
Private Type GUID
Data1 As Long
Data2 As Integer
Data3 As Integer
Data4(7) As Byte
End TypePrivate Const RASTERCAPS As Long = 38
Private Const RC_PALETTE As Long = &H100
Private Const SIZEPALETTE As Long = 104Private Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End TypePrivate Type PicBmp
Size As Long
Type As Long
hBmp As Long
hPal As Long
Reserved As Long
End TypePrivate Declare Function CreateCompatibleDC Lib "GDI32" (ByVal hDC As Long) As Long
Private Declare Function CreateCompatibleBitmap Lib "GDI32" (ByVal hDC As Long, ByVal nWidth As Long, ByVal nHeight As Long) As Long
Private Declare Function GetDeviceCaps Lib "GDI32" (ByVal hDC As Long, ByVal iCapabilitiy As Long) As Long
Private Declare Function GetSystemPaletteEntries Lib "GDI32" (ByVal hDC As Long, ByVal wStartIndex As Long, ByVal wNumEntries As Long, lpPaletteEntries As PALETTEENTRY) As Long
Private Declare Function CreatePalette Lib "GDI32" (lpLogPalette As LOGPALETTE) As Long
Private Declare Function SelectObject Lib "GDI32" (ByVal hDC As Long, ByVal hObject As Long) As Long
Private 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
Private Declare Function DeleteDC Lib "GDI32" (ByVal hDC As Long) As Long
Private Declare Function SelectPalette Lib "GDI32" (ByVal hDC As Long, ByVal hPalette As Long, ByVal bForceBackground As Long) As Long
Private Declare Function RealizePalette Lib "GDI32" (ByVal hDC As Long) As Long
Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hDC As Long) As Long
Private Declare Function OleCreatePictureIndirect Lib "olepro32.dll" (PicDesc As PicBmp, RefIID As GUID, ByVal fPictureOwnsHandle As Long, IPic As IPicture) As Long
Private Declare Function GetPixel Lib "GDI32" (ByVal hDC As Long, ByVal x As Long, ByVal y As Long) As Long
Private Declare Function SetPixel Lib "GDI32" (ByVal hDC As Long, ByVal x As Long, ByVal y As Long, ByVal crColor As Long) As Long'创建一张Bmp的Picture
Private 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 Function'生成PictureBox的Picture
Private Function CaptureWindow(ByVal hWndSrc As Long, 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 hDCSrc = GetDC(hWndSrc) 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 Function
呵呵
这样使用
Set Picture2.Picture = CaptureWindow(Me.hwnd, 0, 0, 80, 80)明白?不知道来得及不哦?
有个API函数叫什么SETPATER,设置指定控件为另一个控件的父类
SETPATER 子类句柄,父类句柄
想过,没有做过.
试一下 GetDcEx 函数,它可以从窗口的缓存里面获取场景,成功的话发个 Emain
[email protected]