StretchBlt(hdc, 512-(ZOOM_SIZE*magnification), 512-(ZOOM_SIZE*magnification), ZOOM_SIZE*magnification, ZOOM_SIZE*magnification, hdc, x, y, ZOOM_SIZE, ZOOM_SIZE, SRCCOPY);
[EDIT]
StretchBlt(hdc, 512+10, 0, 512, 512, hdc, x, y, 60, 60, SRCCOPY);
this it wad i corrected but still can't work.