Controls hide on Dialog Minimize & Maximize

See more:

C++

Hi,

Im developing a application which has multiple tabs with different dialogs having few controls binded to those tabs.
The problem im facing is whenever i do a ALT+TAB my controls(ListControl) on the dialog hide (i mean they are not visible).
But when i select the specific TAB again by a mouse click everything appears normally.

One thing i have noticed is the issue occurs only after i click on the List control once before doing ALT + TAB.

I have tried various things like calling showWindow for the currently selected Tabs Dialog on ParentDialogs onActivate method.

Need some help...