Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!swrinde!elroy.jpl.nasa.gov!decwrl!mcnc!rti!bcw
From: bcw@rti.rti.org (Bruce Wright)
Newsgroups: comp.windows.ms.programmer
Subject: Re: Temporarily adding scrollbars to window
Summary: Why add scroll bars to window attributes?
Message-ID: <1991Apr13.230011.3681@rti.rti.org>
Date: 13 Apr 91 23:00:11 GMT
References: <1991Apr12.044108.4007@mnemosyne.cs.du.edu>
Organization: Research Triangle Institute, RTP, NC
Lines: 25

In article <1991Apr12.044108.4007@mnemosyne.cs.du.edu>, ebergman@isis.cs.du.edu (Eric Bergman-Terrell) writes:
> 
> I'm trying to temporarily add horizontal and vertical scroll bars to a 
> window.
> 
> Will SetWindowLong() do this?
> 
> If so, how must it be used?  I'm trying sumething like the following:
> 
> SetWindowLong(hwnd, GWL_STYLE, WS_OVERLAPPEDWINDOW | WS_VSCROLL | WS_HSCROLL);
> 
> But it doesn't work...  Do I also need to call ShowWindow() and/or
> UpdateWindow()?

You probably can add scroll bars dynamically to a a window this
way - but you'd certainly have to call ShowWindow again, and
probably UpdateWindow as well.

But this looks like the hard way to do it - you can just call
SetScrollRange (hWnd, SB_VERT, 0, 0, TRUE) and voila - the
vertical scroll bar goes away, or SetScrollRange (hWnd, SB_VERT,
0, 100, TRUE) and it comes back again.  I'm not sure I see why
you need to mess around with SetWindowLong ...

						Bruce C. Wright