窗口截图(可指定HWND窗口句柄)（三篇文章）

1. BOOL SaveHwndToBmpFile(HWND hWnd, LPCTSTR lpszPath)
2. {
3. HWND hDesktop = ::GetDesktopWindow();
4. ASSERT(hDesktop);
5. if(NULL == hWnd)
6. {
7. hWnd = hDesktop;
8. }
9. RECT rect;
10. ::GetWindowRect(hWnd, &rect);
11. int nWidht = rect.right - rect.left;
12. int nHeight = rect.bottom - rect.top;
13. HDC hSrcDC = ::GetWindowDC(hWnd);
14. ASSERT(hSrcDC);
15. HDC hMemDC = ::CreateCompatibleDC(hSrcDC);
16. ASSERT(hMemDC);
17. HBITMAP hBitmap = ::CreateCompatibleBitmap(hSrcDC, nWidht, nHeight);
18. ASSERT(hBitmap);
19. HBITMAP hOldBitmap = (HBITMAP)::SelectObject(hMemDC, hBitmap);
20. ::BitBlt(hMemDC, 0, 0, nWidht, nHeight, hSrcDC, 0, 0, SRCCOPY);
21. BITMAP bitmap = {0};
22. ::GetObject(hBitmap, sizeof(BITMAP), &bitmap);
23. BITMAPINFOHEADER bi = {0};
24. BITMAPFILEHEADER bf = {0};
25. CONST int nBitCount = 24;
26. bi.biSize = sizeof(BITMAPINFOHEADER);
27. bi.biWidth = bitmap.bmWidth;
28. bi.biHeight = bitmap.bmHeight;
29. bi.biPlanes = 1;
30. bi.biBitCount = nBitCount;
31. bi.biCompression = BI_RGB;
32. DWORD dwSize = ((bitmap.bmWidth * nBitCount + 31) / 32) * 4 * bitmap.bmHeight;
33. HANDLE hDib = GlobalAlloc(GHND, dwSize + sizeof(BITMAPINFOHEADER));
34. LPBITMAPINFOHEADER lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDib);
35. *lpbi = bi;
36. ::GetDIBits(hMemDC, hBitmap, 0, bitmap.bmHeight, (BYTE*)lpbi + sizeof(BITMAPINFOHEADER), (BITMAPINFO*)lpbi, DIB_RGB_COLORS);
37. try
38. {
39. CFile file;
40. file.Open(lpszPath, CFile::modeCreate | CFile::modeWrite);
41. bf.bfType = 0x4d42;
42. dwSize += sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
43. bf.bfSize = dwSize;
44. bf.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
45. file.Write((BYTE*)&bf, sizeof(BITMAPFILEHEADER));
46. file.Write((BYTE*)lpbi, dwSize);
47. file.Close();
48. }
49. catch(CFileException* e)
50. {
51. e->ReportError();
52. e->Delete();
53. }
54. GlobalUnlock(hDib);
55. GlobalFree(hDib);
56. ::SelectObject(hMemDC, hOldBitmap);
57. ::DeleteObject(hBitmap);
58. ::DeleteDC(hMemDC);
59. ::ReleaseDC(hWnd, hSrcDC);
60. return TRUE;
61. }
62. // 调用方法
63. HWND hWnd = ::FindWindow(NULL, _T("XXX"));
64. if(hWnd)
65. {
66. SaveHwndToBmpFile(hWnd, _T("F://12.bmp"));
67. }

http://blog.csdn.net/visualeleven/article/details/6202796

http://blog.csdn.net/visualeleven/article/details/6206715

http://blog.csdn.net/visualeleven/article/details/6093484