这段程序为什么不对呢
hdc = BeginPaint(hwnd ,&ps);
hdcmem = CreateCompatibleDC(hdc);
bmp = CreateBitmap(100, 100, 1, 1, NULL);
SelectObject(hdcmem, bmp);
MoveToEx(hdcmem, 1, 1, NULL);
LineTo(hdcmem, 1, 10);
nColor = GetPixel(hdcmem, 1, 1);
nColor = GetPixel(hdcmem, 2, 1);
DeleteObject(bmp);
EndPaint(hwnd, &ps);
这段程序中nColor = GetPixel(hdcmem, 1, 1);nColor = GetPixel(hdcmem, 2, 1);两句得到的值总是一样,不是应该两个点的值不一样么