WpfDesigner
WpfDesigner copied to clipboard
TabControl Button Enter To TabItem
Sourcecode from
https://github.com/icsharpcode/WpfDesigner/tree/master/SimpleSample

<local:ToolBoxItem Type="{x:Type TabControl}" />
Press Alt key,Button TabHeader, How to put it in the TabItem?

Don't understand your issue.
Button or Input Text or grid Component drag to TabControl,Why is it at the TabHeader?
When the TabItem has a Grid or Canvas in it's conent it will work. Think maybe it is a problem if you add an empty tab item. Cause the content does not an area reacting to drag/Drop