CMDIChildWndEx::m_dwDefaultTaskbarTabPropertyFlags
A combination of flags, which is passed by the framework to the SetTaskbarTabProperties method, when a tab (MDI child) is being registered with Windows 7 taskbar tabs.
AFX_IMPORT_DATA static DWORD m_dwDefaultTaskbarTabPropertyFlags;
Remarks
The default combination is STPF_USEAPPTHUMBNAILWHENACTIVE | STPF_USEAPPPEEKWHENACTIVE.
Requirements
Header: afxmdichildwndex.h