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Returns a combination of flags that determines what operations are valid when the MDI Tabbed Groups feature is enabled.
DWORD GetMDITabsContextMenuAllowedItems();
Return Value
A bitwise-OR combination of the following flags:
BCGP_MDI_CREATE_VERT_GROUP - can create a vertical tab group.
BCGP_MDI_CREATE_HORZ_GROUP - can create a horizontal tab group.
BCGP_MDI_CAN_MOVE_PREV - can move a tab to the previous tab group.
BCGP_MDI_CAN_MOVE_NEXT - can move a tab to the next tab group.
Remarks
When the MDI Tabbed Groups feature is enabled, you must know what operations are allowed on the tabs of a particular window. This method analyzes the current layout of tabbed windows and returns a combination of flags that can be used to build, for example, a shortcut menu.
You can create a new vertical tab group when all tabbed windows are aligned vertically, or when there is only one tabbed window.
You can create a new horizontal tab group when all tabbed windows are aligned horizontally, or when there is only one tabbed window.
You can move a tab to the previous group only if there is more than one tab in a tabbed window.
You can move a tab to the next group only if there is more than one tab in a tabbed window.
Requirements
Header: afxMDIFrameWndEx.h