I have a window where a bitmap is displayed. Next I have a menu "Zoom"
On selecting Zoom a dialog is displayed that has 3 radio buttons.
ist radio button shows zoomto 100%
2nd radio button shows zoomto 200%
3rd radio button shows zoomto 300%

On selecting each radio button the bitmap can be zoomedto the respective size.

I have used stretchblt() but it is not working . Please give me a detailed help.
Thanks