Registers or unregisters an autohide appbar for a given edge of the screen. If the system has multiple monitors, the monitor that contains the primary taskbar is used.
Note To register or unregister an autohide appbar on a specific monitor, use ABM_SETAUTOHIDEBAREX.
A pointer to an APPBARDATA structure. Set the lParam member to TRUE to register the appbar or FALSE to unregister it. You must specify the cbSize, hWnd, uEdge, and lParam members when sending this message; all other members are ignored.
Returns TRUE if successful, or FALSE if an error occurs or if an autohide appbar is already registered for the given edge.
The system allows only one autohide appbar for each edge of the screen. This is determined when the member uEdge of the APPBARDATA structure is set.
Minimum supported client
|Windows XP [desktop apps only]|
Minimum supported server
|Windows 2000 Server [desktop apps only]|