请问,我想打印当前的窗口 ,怎么做

最简单的方法就是先抓屏，保存为bmp，然后调用shellexecute来打印文件
抓屏的代码很多
首先得到窗体dc,然后CopyDCToBitmap,然后SaveBmp,然后
ShellExecute(NULL,"print",FileName,NULL,NULL,SW_HIDE);,相关函数见后面BOOL SaveBmp(HBITMAP hBitmap, CString FileName)
{
HDC hDC;
int iBits; //当前分辨率下每象素所占字节数
WORD wBitCount; //位图中每象素所占字节数
//定义调色板大小，位图中像素字节大小，位图文件大小，写入文件字节数
DWORD dwPaletteSize=0, dwBmBitsSize=0, dwDIBSize=0, dwWritten=0;
BITMAP Bitmap; //位图属性结构
BITMAPFILEHEADER bmfHdr; //位图文件头结构
BITMAPINFOHEADER bi; //位图信息头结构
LPBITMAPINFOHEADER lpbi; //指向位图信息头结构
HANDLE fh, hDib, hPal,hOldPal=NULL; //定义文件，分配内存句柄，调色板句柄

//计算位图文件每个像素所占字节数
hDC = CreateDC("DISPLAY", NULL, NULL, NULL);
iBits = GetDeviceCaps(hDC, BITSPIXEL) * GetDeviceCaps(hDC, PLANES);
DeleteDC(hDC);
if (iBits <= 1)  wBitCount = 1;
else if (iBits <= 4)  wBitCount = 4;
else if (iBits <= 8)  wBitCount = 8;
else      wBitCount = 24;

GetObject(hBitmap, sizeof(Bitmap), (LPSTR)&Bitmap);
bi.biSize   = sizeof(BITMAPINFOHEADER);
bi.biWidth   = Bitmap.bmWidth;
bi.biHeight   = Bitmap.bmHeight;
bi.biPlanes   = 1;
bi.biBitCount  = wBitCount;
bi.biCompression = BI_RGB;
bi.biSizeImage  = 0;
bi.biXPelsPerMeter = 0;
bi.biYPelsPerMeter = 0;
bi.biClrImportant = 0;
bi.biClrUsed  = 0;

dwBmBitsSize = ((Bitmap.bmWidth * wBitCount + 31) / 32) * 4 * Bitmap.bmHeight;

//为位图内容分配内存
hDib = GlobalAlloc(GHND,dwBmBitsSize + dwPaletteSize + sizeof(BITMAPINFOHEADER));
if(hDib == NULL)
return false;
lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDib);
*lpbi = bi;

// 处理调色板
hPal = GetStockObject(DEFAULT_PALETTE);
if (hPal)
{
hDC = ::GetDC(NULL);
hOldPal = ::SelectPalette(hDC, (HPALETTE)hPal, FALSE);
RealizePalette(hDC);
}

// 获取该调色板下新的像素值
GetDIBits(hDC, hBitmap, 0, (UINT) Bitmap.bmHeight, (LPSTR)lpbi + sizeof(BITMAPINFOHEADER)
+dwPaletteSize, (BITMAPINFO *)lpbi, DIB_RGB_COLORS);

//恢复调色板
if (hOldPal)
{
::SelectPalette(hDC, (HPALETTE)hOldPal, TRUE);
RealizePalette(hDC);
::ReleaseDC(NULL, hDC);
}

//创建位图文件
fh = CreateFile(FileName, GENERIC_WRITE,0, NULL, CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL);

if (fh == INVALID_HANDLE_VALUE)  return FALSE;

// 设置位图文件头
bmfHdr.bfType = 0x4D42; // "BM"
dwDIBSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + dwPaletteSize + dwBmBitsSize;
bmfHdr.bfSize = dwDIBSize;
bmfHdr.bfReserved1 = 0;
bmfHdr.bfReserved2 = 0;
bmfHdr.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER) + dwPaletteSize;
// 写入位图文件头
WriteFile(fh, (LPSTR)&bmfHdr, sizeof(BITMAPFILEHEADER), &dwWritten, NULL);
// 写入位图文件其余内容
WriteFile(fh, (LPSTR)lpbi, dwDIBSize, &dwWritten, NULL);
//清除
GlobalUnlock(hDib);
GlobalFree(hDib);
CloseHandle(fh);

return TRUE;
}HBITMAP CopyDCToBitmap(HDC hScrDC, LPRECT lpRect)
{
HDC        hMemDC; // 屏幕和内存设备描述表
HBITMAP    hBitmap,hOldBitmap;  // 位图句柄
int       nX, nY, nX2, nY2;     // 选定区域坐标
int       nWidth, nHeight;      // 位图宽度和高度 if (IsRectEmpty(lpRect)) // 确保选定区域不为空矩形
return NULL;

// 获得选定区域坐标
nX = lpRect->left;
nY = lpRect->top;
nX2 = lpRect->right;
nY2 = lpRect->bottom;
nWidth = nX2 - nX;
nHeight = nY2 - nY;

hMemDC = CreateCompatibleDC(hScrDC);//为屏幕设备描述表创建兼容的内存设备描述表

// 创建一个与屏幕设备描述表兼容的位图
float factor = 1.0f;
hBitmap = CreateCompatibleBitmap(hScrDC, nWidth, nHeight);
while(!hBitmap)
{
factor -= 0.05f;
hBitmap = CreateCompatibleBitmap(hScrDC, (int)(nWidth*factor), (int)(nHeight*factor));
}
// 把新位图选到内存设备描述表中
hOldBitmap = (HBITMAP)SelectObject(hMemDC, hBitmap);
// 把屏幕设备描述表拷贝到内存设备描述表中
StretchBlt(hMemDC,0,0,nWidth,nHeight,hScrDC,nX,nY,nWidth,nHeight,SRCCOPY);
//BitBlt(hMemDC, 0, 0, nWidth, nHeight,hScrDC, nX, nY, SRCCOPY);
//得到屏幕位图的句柄 hBitmap = (HBITMAP)SelectObject(hMemDC, hOldBitmap);
//清除

// DeleteDC(hScrDC);
DeleteDC(hMemDC);
DeleteObject(hOldBitmap);
// 返回位图句柄
return hBitmap;
}
Using Windows XP Visual Styles and PrintWindow in Windows Applications
http://msdn.microsoft.com/library/en-us/dnwxp/html/xpvisualstyles.aspWindows XP also introduces the new printing API, PrintWindow. This API enables the caller to snapshot a visual copy of a window into a device context.

调试易

请问,我想打印当前的窗口 ,怎么做

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