ControlDesigner GetHitTest is not supported under net6.0
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area-VSDesigner
- Dominant language
- C#
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Description
### Environment
17.11.3
### .NET version
net6.0 - net8.0
### Did this work in a previous version of Visual Studio and/or previous .NET release?
framework **all** is normal
### Issue description
my custom controls cannot capture mouse clicks, but `System.Windows.Forms.TabControl` can
### Steps to reproduce
Here is a demo, the **framework 4.8** can capture the mouse in the designer, but I hope the designer can also capture the mouse normally under **net6.0**
[TestDesignGetHitTest.zip](https://github.com/user-attachments/files/16956778/TestDesignGetHitTest.zip)
### Diagnostics
_No response_
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Assessment
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