Using BitBlt to overlay images

[paulsoulsby]

Hi,

I've got images of a oval button and an oval mask (white oval on a black background). I've also got a form with a background image. I'm wanting to cut the image of the button out using the mask and put it on the forms background image.

I believe that BitBlt is the best of of doing it (i.e. store the button image and mask in invisible Picture Boxes and use BitBlt). Just not totally sure of how to implement it.

Has anyone got any example code or links to code/threads, that would help me out with this.

many thanks

Paul

[LaVolpe]

Are you saying that the end result should be an oval shape with the form's bkg image drawn within the oval? If so, you mentioned the mask is white oval over black bkg. Does the non-mask have a white bkg?

[paulsoulsby]

The end result should be the forms background image with the oval button on top. At the moment the mask is a white oval on a black background, but I can easily invert this if I need to. The forms background is blue and the oval button image is on black.

[LaVolpe]

Mask is white on black bkg and non-mask is whatever on white bkg? Ok, I think this is what you want if I understand you correctly. Let us know.

Blit the mask first using the ROP vbSrcPaint
Blit non-mask using ROP vbSrcAnd