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Re: dlm question [message #33015 is a reply to message #32922]

Thu, 21 November 2002 05:34

Randall Skelton
Messages: 169
Registered: October 2000

Senior Member

On Thu, 21 Nov 2002, Randall Frank wrote:

> Consider the IDL naming scheme for objects and consider the
> mechanism for calling a C++ method from C in something like VC++
> (take DirectX as an example). This should give you some idea.
> Ronn is correct in that RSI has not released this information and
> there is no direct way of doing this. That having been said,
> with some creativity, one can write some accessor functions that
> will get you 90% of the way there, along the lines of what Ronn
> suggests (playing with the 'self' reference creatively) until RSI
> exposes the necessary functions. I'm not sure what this buys you
> over a object written as a .PRO file that happens to call out to
> some 'C' functions in a DLM however (an approach that will not
> break over time)...

I tend to agree-- I've been writing IDL object code that calls my C dlms
for the past year now. Last year I begged and pleaded with RSI to release
this interface (even with a non-disclosure agreement) and had no luck
getting it. I even did my bit to reverse engineer the interface which was
quite successful. I would post what I learned but fear Craig-like
repercussions. My main comment is that while gaining access to the object
API would be nice, the holly grail would involve stable, direct access
(via a C API) to the IDL heap variable. This, along with my request for
proper operator over-loading in IDL objects are my top two requests. Are
any of the lurkers at RSI listening?

Note to DF: Are you ready to compile a new top 10 list?

Cheers,
Randall

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[Message index]

		Re: dlm question By: ronn on Wed, 13 November 2002 05:22
		Re: dlm question By: Rick Towler on Tue, 12 November 2002 16:47
		Re: dlm question By: David Fanning on Tue, 12 November 2002 14:51
		Re: dlm question By: David Shadovitz on Tue, 12 November 2002 14:22
		Re: dlm question By: Randy Frank on Wed, 20 November 2002 19:52
		Re: dlm question By: Randall Skelton on Thu, 21 November 2002 05:34

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