after migrating my project from Visual Studio 2008 to 2012, I missed the repainting of the MDI-Client-Window while moving the Child-Frame. My project consists of a lot of different child-frame classes. After closing all childs the MDI-Client-Window will be repainted. Minimize and maximize the application will caused a black colored MDI-Client-Window. I´ve already tried to migrate the project to VS 2010 first and than migrate from 2010 to 2012 with no success. But I´ve recognized that the issues doesn´t come up in VS 2010.
I hope that somebody can help me,
thanks in advance