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Hello,

I have an usercontrol based on the ToolStripControlHost. The ToolStripDropDown pops up as soon as the user hovers the control.
Problem: When the DropDown of the 1st usercontrol is already open the MouseHover of the 2nd usercontrol is not been fired; it will be fired only when the DropDown has been closed before.
So I need a solution to track the MouseMove or MouseEnter when the DropDown is open and the mouse hovers another control.

Background: I want to create a popup control where the user can hovers the header items. If one header is hovered an usercontrol will be shown with different sub-items.

What I have tried:

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Tried unsucessfully to implement IMessageFilter.
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Richard MacCutchan 5-Oct-18 9:20am    
If you hover your mouse over the header items at the top of this page you will see that only one dropdown is open at one time. This is standard and expected behaviour.

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