屏幕截图.doc

文档介绍：像红蜻蜓,还有QQ等,上面的屏幕截图都非常的不错,那么,如何在自己的程序中加入这一功能呢?屏幕截图,实际上就是把屏幕拷贝下来,然后将其保存到文件或者保存到剪贴板,下面的函数,向你展示了这一功能:HBITMAPCopyScreenToBitmap(LPRECTlpRect){    HDChSrcDC=NULL,hMemDC=NULL;    HBITMAPhBitmap=NULL,hOldBitmap=NULL;    intx1,y1,x2,y2;    intnWidth,nHeight;    intxScreen,yScreen;    if(IsRectEmpty(lpRect))        returnNULL;    hSrcDC=CreateDC("DISPLAY",NULL,NULL,NULL);    hMemDC=patibleDC(hSrcDC);    x1=lpRect->left;    y1=lpRect->top;    x2=lpRect->right;    y2=lpRect->bottom;    xScreen=GetDeviceCaps(hSrcDC,HORZRES);    yScreen=GetDeviceCaps(hSrcDC,VERTRES);    if(x1<0)        x1=0;    if(y1<0)        y1=0;    if(x2>xScreen)        x2=xScreen;    if(y2>yScreen)        y2=yScreen;    nWidth=x2-x1;    nHeight=y2-y1;        hBitmap=patibleBitmap(hSrcDC,nWidth,nHeight);    hOldBitmap=(HBITMAP)SelectObject(hMemDC,hBitmap);        BitBlt(hMemDC,0,0,nWidth,nHeight,hSrcDC,x1,y1,OPY);    hBitmap=(HBITMAP)SelectObject(hMemDC,hOldBitmap);        DeleteDC(hSrcDC);    DeleteDC(hMemDC);    returnhBitmap;}BOOLSaveBitmapToFile(HBITMAPhBitmap,LPCTSTRlpFileName){    HDChDC=NULL;    intiBits=0;    WORDwBitCount=0;    DWORDdwPaletteSize=0;    DWORDdwBmBitsSize=0,dwDibSize=0,dwWritten=0;    BITMAPBitmap;    BITMAPFILEHEADERbmfHdr;    BITMAPINFOHEADERbi;    LPBITMAPINFOHEADER    lpbi;    HANDLEfh=NULL,hDib=NULL,hPal=NULL,hOldPal=NULL;    hDC=CreateDC("DISPLAY",NULL,NULL,NULL);    if(hDC==NULL)        ret