CMFCDropDownToolbarButton::IsDropDown
Determines whether the drop-down toolbar is currently open.
BOOL IsDropDown() const;
Return Value
Nonzero if the drop-down toolbar is currently open; otherwise 0.
Remarks
The framework opens the drop-down toolbar by using the CMFCDropDownToolbarButton::DropDownToolbar method. The framework closes the drop-down toolbar when the user presses the left-mouse button in the non-client area of the drop-down toolbar.
Requirements
Header: afxdropdowntoolbar.h