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That was a good catch! This was the problem, it was easy to see after you explained it :)

Thank you, it is working fine now.

If I don't clone the "bm" I will not be able to make any changes to "bm" the 2nd time I run the function. It will be locked in the "PictureBox" object.

BTW If I comment out the line where I clone...

If I remove the disposing of the picturebox it will crash the 2nd time I run the it.

I tried to comment out PaintCScan (pixels) and it does not crash.

I have also stepped through the code:

It is crashing when "PictureBox1.Image = bm.Clone" is executed the 5th time. It always...

I have some code to update a picturebox. To speed up the process I'm using LockBits.

The code works the 4 first times I push the button, then I get a windows error (vshot32.exe has stopped...