CMFCAutoHideButton::IsHorizontal
Determines whether the auto-hide button is horizontal or vertical.
BOOL IsHorizontal() const;
Return Value
Nonzero if the button is horizontal; 0 otherwise.
Remarks
The framework sets the orientation of a CMFCAutoHideButton object when you create it. You can control the orientation by using the dwAlignment parameter in the CMFCAutoHideButton::Create method.
Requirements
Header: afxautohidebutton.h