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 | virtual | 
Called by the framework to display a control bar's gripper.
The default implementation displays the standard gripper. Override this member function in your CBCGPVisualManager - derived class to customize the gripper appearance.
| pDC | A pointer to a control bar's device context. | 
| rectGripper | The gripper's bounding rectangle. | 
| bHorz | Specifies whether the control bar is docked horizontally (TRUE) or vertically (FALSE). | 
| pBar | A pointer to a control bar whose gripper is drawn. |