Docks a pane to the left of another pane.
BOOL DockPaneLeftOf(
   CPane* pBarToDock,
   CPane* pTargetBar
);
Parameters
- [in] pBarToDock 
 A pointer to the pane to be docked to the left of pTargetBar.
- [in] pTargetBar 
 A pointer to the target pane.
Return Value
TRUE if the pane was docked successfully; otherwise, FALSE.
Requirements
Header: afxdockingmanager.h