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Can a CALL_EXTERNAL .dll create a window? [message #36303]

Fri, 29 August 2003 08:37

Matt Feinstein
Messages: 33
Registered: July 2002

Member

Hi all--

I'm trying to write a CALL_EXTERNAL .dll that does off-screen
hardware-assisted OpenGL rendering. My first try crashes IDL pretty
much immediately, so I'm trying to eliminate possibilites for bugs.
This tends to be difficult, since you can't run a .dll by itself... &
it would be good if I could get some help in focussing my efforts on
likely suspects.

The first suspect I can think of is that I have to create a Win32
window in the .dll. The reason I have to do this is that to get an
off-screen hardware assisted rendering context one -has- to begin with
an on-screen hardware assisted rendering context, which, in turn,
means that you have to create a window. Is there a fatal difficulty in
doing this in an IDL CALL_EXTERNAL .dll? Or, better, is there some
combination of window properties that make it OK?

Any help here would be appreciated.

Matt Feinstein

--
There is no virtue in believing something that can be proved to be true.

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[Message index]

		Can a CALL_EXTERNAL .dll create a window? By: Matt Feinstein on Fri, 29 August 2003 08:37
		Re: Can a CALL_EXTERNAL .dll create a window? By: Matt Feinstein on Thu, 04 September 2003 05:27
		Re: Can a CALL_EXTERNAL .dll create a window? By: Rick Towler on Wed, 03 September 2003 12:37
		Re: Can a CALL_EXTERNAL .dll create a window? By: Matt Feinstein on Wed, 03 September 2003 11:02

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