BCGControlBar Pro for MFC
void CBCGPMDIFrameWnd::EnableMDITabs ( BOOL  bEnable = TRUE,
BOOL  bIcons = TRUE,
CBCGPTabWnd::Location  tabLocation = CBCGPTabWnd::LOCATION_BOTTOM,
BOOL  bTabCloseButton = FALSE,
CBCGPTabWnd::Style  style = CBCGPTabWnd::STYLE_3D_SCROLLED,
BOOL  bTabCustomTooltips = FALSE,
BOOL  bActiveTabCloseButton = FALSE 

Enables the MDI frame window to show tabs for each MDI child window.

Call this member function to enable or disable the MDI frame window to show tabs for the MDI child windows.

The tabs can be located at the top or bottom of the frame, according to the third parameter tabLocation. You may specify either CBCGTabWnd::LOCATION_BOTTOM (the default) or CBCGTabWnd::LOCATION_TOP values. If bTabCustomTooltips is TRUE, the BCGM_ON_GET_TAB_TOOLTIP message will be sent to main frame. You can handle this message and provide the framework with custom tooltips to be displayed for MDI tabs.

bEnableSpecifies whether the tabs enabled (TRUE) or disabled (FALSE)
bIconsSpecifies whether the document icons should be displayed on the tabs (TRUE) or not.
tabLocationSpecifies the location of the tabs.
bTabCloseButtonSpecifies if the tab close button is present.
styleSpecifies the style of MDITabs. Use STYLE_3D_SCROLLED for the regular style or STYLE_3D_ONENOTE for Microsoft OneNote style.
bTabCustomTooltipsSpecifies whether custom tooltips are enabled or disabled.
bActiveTabCloseButtonIf TRUE, a close button will be displayed on active tab instead of right top corner of tab area.