[GD-Windows] Custom colors on a scrollbar in a tree control?

[Space N. E. <SPA...@ho...>]

Hi,

I have a Win32 app (no MFC) with a lot of subclassed common controls -
subclassed so I can draw them the way I like. One big problem I've run into
is that I can't seem to control the colors that scrollbars are drawn with
when a window has WS_VSCROLL/WS_HSCROLL styles specified - this happens, for
example, when a the data in a tree control is too large to fit in the client
area.

I know that the SysColors are used to control the drawing of window
scrollbars, but I don't want to change the color of all scrollbars (and 3d
controls in general), just those of my app. And more specifically, I'm a
plugin, not an app, so I REALLY don't want to change the colors of the host
app.

I also tried double buffering - tweaking the WM_PAINT/WM_NCPAINT messages I
receive, and sending in an offscreen HDC when I call the tree control's
default window proc. Then I render over top of the scrollbars to effectively
draw my own. This works very well, except that the scrollbars somehow redraw
themselves without the aid of WM_PAINT/WM_NCPAINT when they are being
dragged around, yielding a horrific flickering.

How do web pages change IE's scrollbar colors? I'm guessing that the web
browser control either has custom scrollbars, or uses a scrollbar control,
etc. Bummer.

Well, if anyone knows of a good way to do "owner draw" scrollbars on a
window (not scrollbar controls), let me know!

Thanks,
Brian