c# - Black layer on top of title bar (minimize/maximize/close) in Win7 -

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we have .net 2.0 application using winforms , infragistics 7.2. title bar our application has appears black bar layered on covering minimize, maximize , close buttons. buttons still there (as evidenced hover colouring , tooltips in screen shot) , still work when click in correct location, buttons not visible.

black title bar

this happening on few win7 machines, , may theme related? have other applications using same framework/technology running on same machine, don't have problem. @ 1 point pc had problem in debug build running through vs2010, installed release (same source code) didn't. we've tried exporting themes 1 pc other problem doesn't appear exported it.

any suggestions appreciated!

had similar problem , solved changing formborderstyle:

formborderstyle = system.windows.forms.formborderstyle.fixeddialog;

hope helps.


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