HBITMAP hBitmap;

// From File:
hBitmap = (HBITMAP)LoadImage(hInstance, "myimage.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE | LR_CREATEDIBSECTION);

// From Resource:
hBitmap = LoadBitmap(MAKEINTRESOURCE(IDB_MYBMP));

Ok we just loaded the .BMP...

BITMAP BMP;
GetObject(hBitmap, sizeof(BMP), &BMP);  // Here we get the BMP header info.

HDC BMPDC = CreateCompatibleDC(NULL); // This will hold the BMP image itself.

HDC hDC = GetDC(hWnd);
SelectObject(BMPDC, hBitmap); // Put the image into the DC.

BitBlt(hDC, X, y, BMP.bmWidth, BMP.bmHeight, BMPDC, 0, 0, SRCCOPY); // Finally, Draw it :)

ReleaseDC(hDC, hWnd);

// Don't forget to clean up!
DeleteDC(BMPDC);
DeleteObject(hBitmap);