CMFCTabCtrl::GetFirstVisibleTabNum
Retrieves the index of the first tab that is visible in the current tab control.
virtual int GetFirstVisibleTabNum() const;
Return Value
The zero-based index of a tab in the tab control.
Remarks
Use this method only when the tab control is displayed in the style of Microsoft OneNote. Use the CMFCTabCtrl::IsOneNoteStyle method to determine the style.
Requirements
Header: afxtabctrl.h