Notifies an appbar that the taskbar's autohide or always-on-top state has changed ¾ that is, the user has checked or unchecked the "Always on top" or "Auto hide" check box on the taskbar's property sheet. An appbar can use this notification message to set its state to conform to that of the taskbar, if desired.
ABN_STATECHANGE
Return Values
No return value.