CPane::GetAvailableStretchSize
Returns the amount, in pixels, that the pane can shrink.
virtual int GetAvailableStretchSize() const;
Return Value
The amount, in pixels, that the pane can shrink. If the pane is docked horizontally, this amount is the available width; otherwise, it is the available height.
Remarks
The available stretch size is calculated by subtracting the minimum allowed size for the pane (CPane::GetMinSize) from the current size (CWnd::GetWindowRect).
Requirements
Header: afxpane.h