This topic is included for completeness. For more detail see the source code located in the VC\atlmfc\src\mfc folder of your Visual Studio installation.
virtual BOOL SetPreDockState(
AFX_PREDOCK_STATE preDockState,
CBasePane* pBarToDock = NULL,
AFX_DOCK_METHOD dockMethod = DM_MOUSE
);
Parameters
[in] preDockState
[in] pBarToDock
[in] dockMethod
Requirements
Header: afxmultipaneframewnd.h