Pete,
Thanks.
My concern is that this function will hide the window completely. What I require is that the window is visible, but that there is no Taskbar item associated with it.
With repect to creating the the application window with the WS_EX_TOOLWINDOW extended style, if the window is minimized (lets not worry about how to restore the window, I can deal with that separately) the minimized window is placed above the Taskbar, similar in fashion to the way a child window behaves when minimized in an MDI application.