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dialogs have a black bar at the bottom below the OK and Cancel buttons

Andreas Liedhegener


Hi support,


We’ve got an application which shows weird behavior for two dialogs at our customer’s site. Most times (not always) the dialogs have a black bar at the bottom below the OK and Cancel buttons. Whenever this happens the dialogs can’t be quit, neither with OK nor with Cancel. When the user resizes the dialog using the mouse the black bar disappears and the buttons work properly.

Unfortunately we fail to reproduce this behavior at our own site. The application is developed using DevExpress Winforms. Our customer uses Citrix Virtual Apps and Desktops 7. With version everything works fine as it should. Both versions 1912.0.0.24265 and 2006.0.0.26044 show the weird behavior.


Do you have any idea what is wrong? Your help is much appreciated.


Thanks in advance!

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