Rectangle Over An Image

[john5632]

Hi, I have drawn an image on picture control using GDI. I want to crop the image accroding to user selection with a rectangle over the image. How can I draw a transparent rectangle area over an image?

[bob16972]

Here's an old post of mine describing how to rubberband a line but the idea is basically the same for a rectangle. Rubberbanding[^] Also have a look at CRectTracker which works nice in this context.

[Rozis]

Look for ROP2 drawing codes in the GDI documentation (function SetROP2()). They do exactly what you want. Rozis