Returns the size and position of the tab area in the tabbed window.
virtual void GetTabArea(
    CRect& rectTabAreaTop,
    CRect& rectTabAreaBottom 
) const;
Parameters
- [out] rectTabAreaTop 
 Contains the size and position, in screen coordinates, of the top tab area.
- [out] rectTabAreaBottom 
 Contains the size and position, in screen coordinates, of the bottom tab area.
Remarks
The framework calls this method to determine how to dock a pane that a user is dragging. When the user drags a pane over the tab area of the target pane, the framework tries to add it as a new tab of the target pane. Otherwise, it tries to dock the pane to the side of the target pane, which involves creating a new pane container with a pane divider that separates the two panes.
Override this method in a CTabbedPane-derived class to change this behavior.
Requirements
Header: afxTabbedPane.h