Hi Robert,
This seems like a windows issue. After a quick Google search I found many links which explain what GWES is (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wceshellui5/html/wce50conShellandUs...), and many people who encountered similar errors with different applications. Since the GWES stands for Graphics, Windowing, and Events Subsystem, I was wondering if you can correlate the crashes with anything in you program that has to do with using a graph, or event structure, etc.
You may want to read some of the posts online in case one of them is similar to your issue.
Regards,
AG
