Make Seamless tiles

I've made this app to create a seamless tile, but now that I have the composite of pictures I want in picMain, I need to know how to render the image and save as a bitmap. I've tried Bitblt and paintpicture but to no avail. Can anyone show me how to do it?

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Attached Files

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  Clik here to view. TileMaker.zip (54.1 KB)