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I have WinForm controls I want to put in a WPF DropDownButtons(Extended WPF Toolkit) DropDownContent. Putting the controls to a WindowsFormsHost and that one is giving to the DropDownContent doesn’t work.
The Winforms control doesn’t visible. In the template the DropDownContent property is a ContentPresenter.
If I want to try this whole story with a common container (StackPanel, Grid, etc.) it works fine.
Does anybody know how can I solve this?
The DropDownButton has a Popup whose AllowsTransparency is set to true – see the template here. You cannot put a WindowsFormsHost into a Popup whose AllowsTransparency is true. You’ll have to modify the template for the DropDownButton so that its AllowsTransparency is false.