SelectWindow
an inactive window. It unhighlights the current active window, brings the
specified window to the front, highlights it, and generates an activate event for
the window and an update events for the affected windows.
Notes: The previously-active window will be moved into a position directly
behind theWindow. If theWindow is already frontmost and unhidden, this
function will have no effect.
Use this after FindWindow reports that the mouse-down occurred in an inactive window.