Public Overridable Function CreateCustomControl( _
   ByVal shape As IShape _
) As Control

public virtual Control CreateCustomControl( 
   IShape shape
)

Parameters

shape

Specifies the shape in question; check the ID or Name property to distinguish one shape from another.

Override this method to provide a custom control replacement for an autoshape. Worksheet form controls such as checkboxes cannot be replaced.

The control will be disposed of as soon as it is scrolled out of view and CreateCustomControl will be called again if it is scrolled back into view.

Reference