These menu control styles are available:

MS_ACTIONBAR

The items in the list are displayed side-by-side. This style is used to implement a top level menu. Menus that do not have this style are displayed in one or more columns and are submenus associated with an action bar.

All menu controls have styles CS_SYNCPAINT and CS_PARENTCLIP.

MS_CONDITIONALCASCADE
This style is used to specify that the items in this list are a conditional cascade menu. Conditional cascade menus act like normal cascade menus with the exception that the cascade does not automatically open when the user selects it. To open the conditional cascade menu, the mini-pushbutton on the menu item must be selected. If the menu is selected without opening the cascade, the default item in the cascade is selected. The default action on the cascade is identified by a check mark.
MS_TITLEBUTTON
Used to identify menus that can be used as buttons in the title bar. Can only be used with MS_ACTIONBAR.

This style causes the menu to be drawn using the CUA colors specified for the title bar rather than the action bar.

MS_VERTICALFLIP
Normally, pull-down menus (the default, without the MS_VERTICALFLIP style) are displayed below their associated action bar item. If there is not room on the screen to display the entire pull-down in this manner, and if there is room to display the pull-down above the action bar, it is displayed above the action bar. Pull-down menus with the MS_VERTICALFLIP style are flipped vertically. That is, they are displayed above the menu if possible, otherwise below it. The vertical flip style must be set explicitly by the application when the window is minimized, and must be reset when it is restored.

If an application action bar contains this style, the style is applied to all pull-down menus belonging to the action bar (the style does not directly affect the display of the action bar). This provides a convenient means for the application to flip the appearance of all pull-down menus.

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