Attempted to read or write protected memory again...

Hello,
I still struggling with this problem on a windows 7 platform.
However i found out that the program wants to use a part of the memory that he may not use.
In my case it only happens when i want to print something.
In there i have a PrintPreviewDialog and add a PrintDocument.
After that one is loaded it shows the document on the PrintPreviewDialog.
Most errors that appear show drawing errors.

So, how can i tell windows that the program may use the memory?
A friend of mine thought it was something like this:
Thanks for the reply!

Are you having the same problem running the program under the Win XP platform?

CroCrew~

No, under windows xp it's working perfectly.
It only happens under windows 7 (maybe vista but i don't have that)