Called by the framework to render the gripper of the control bar.
virtual void DrawGripper(
   CDC* pDC,
   const CRect& rect 
);
Parameters
- pDC 
 Points to the device context to be used for rendering the control bar gripper.
- rect 
 A CRect object containing the dimensions of the control bar gripper.
Remarks
Override this function to customize the appearance of the control bar gripper.
Requirements
Header: afxext.h