SetDIBits and GetDIBits in MFC?

[C++ Programming]

Hi everybody !

Can you help me on finding the *****alant of these functions in MFC? Many thanks in advance.

bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
bi.bmiHeader.biWidth = dstX;
bi.bmiHeader.biHeight = dstY;
bi.bmiHeader.biPlanes = 1;
bi.bmiHeader.biBitCount = 32;
bi.bmiHeader.biCompression = BI_RGB;
bi.bmiHeader.biSizeImage = dstX * 4 * dstY;
bi.bmiHeader.biClrUsed = 0;
bi.bmiHeader.biClrImportant = 0;
SetDIBits(hdcDst, hBmpDst, 0, dstY, dst, &bi, DIB_RGB_COLORS);


bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
bi.bmiHeader.biWidth = nx;
bi.bmiHeader.biHeight = - ny;
bi.bmiHeader.biPlanes = 1;
bi.bmiHeader.biBitCount = 32;
bi.bmiHeader.biCompression = BI_RGB;
bi.bmiHeader.biSizeImage = nx * 4 * ny;
bi.bmiHeader.biClrUsed = 0;
bi.bmiHeader.biClrImportant = 0;

buf = (pBGR) malloc(nx * 4 * ny);
bRes = GetDIBits(cdcSrc, cBmpSrc, 0, ny, buf, &bi, DIB_RGB_COLORS);