TreeView - Drag and Drop

Question

I have one tree view here i have tried to fire the DragOver event for the TreeView. but it could not fired.

 

Code Snippet :

 

this.trvw_Schemas.DragOver += trvw_Schemas_PreviewDragOver; 

 

void trvw_Schemas_PreviewDragOver(object sender, DragEventArgs e)

{

}

 

Please let us know if anyone have the Answer