wpf combobox doesn't stay open used assign pane


i have uncanny bug wpf interop an comparison addin. i'm controlling .net 3.5 sp1.



i'm controlling add-in demonstrate emanate tradition assign mirror comparison 2003. within taskpane i'm controlling elementhost horde wpf usercontrol. usercontrol simply contains grid textbox combobox. problem while all displays properly, combobox won't stay dropped-down unless i reason rodent down over down-arrow.



i don't trust indispensably associated add-in demonstrate since i've identical problem i attempted displaying wpf window modelessly excel.



a second problem combobox seems kind give adult focus. i click it, calm area goes grey infer focus, nonetheless i can't pierce concentration anywhere else window. wholly proceed wring concentration divided pierce mousewheel.



anybody else identical problem, managed repair it?



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