| Re: DDE on IDL [message #2057] |
Mon, 23 May 1994 15:04  |
![HADFIELD[1] is currently offline](theme/default/images/xoffline.png.pagespeed.ic.XRkd1fkXye.png "HADFIELD[1] is currently offline")
HADFIELD[1]
Messages: 9
Registered: March 1994
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Junior Member |
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In article <harmer.3.2DDCACB8@ph.und.ac.za> harmer@ph.und.ac.za (MARK HARMER) writes:
> I am attempting to write a C application which interacts with IDL
> using the IDL DDE routines (viz dde_getservers(), dde_gettopics() ...)
> under windows.
> ...
> The problem I have is that 'dde_getservers()' produces a null result
> when DDESRVR.EXE is running. In fact, with the exception of Word for
> Windows, every DDE server application that I have tried (which is
> quite a few) is not recognised as being 'out there' by a call to
> 'dde_getservers()'.
> This seems to indicate that these applications are not using the DDE
> conventions expected of them by IDL, or I am doing something wrong.
DDE_GETSERVERS() has never worked for me either. I've just
assumed it was a bug. (I never noticed that it worked with Word for Windows. I
just tried it now and it returned a string array with a single
element: "#352:(0001)". I wonder what that's supposed to mean.)
Anyway, the problem with DDE_GETSERVERS()--and I'm sure that's where the
problem lies, not with your or anybody else's applications--isn't fatal. You
just have to make sure that the DDE server in question is running by some
other means. The other IDL DDE routines work, although some don't respond to
error conditions in the way the manual says they should.
I have used Visual Basic to write a simple DDE server that supplements IDL's
MS-Windows capabilities. With this I can launch a Windows application
(withoug going through DOS) and copy IDL strings to the Clipboard. The Visual
Basic programming was quite straightforward. I have also used DDE from IDL to
control multiple file conversions in Excel. So it can certainly be done.
You're welcome to e-mail me for more info.
============================================================ ===========
Mark Hadfield hadfield@greta.niwa.cri.nz
NIWA Marine (Taihoro Nukurangi) NIWA.GRETA:HADFIELD
Wellington, New Zealand
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| Re: DDE on IDL [message #2145 is a reply to message #2057] |
Wed, 25 May 1994 15:55  |
dnguyen
Messages: 4
Registered: May 1994
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Junior Member |
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IDL DDE routines has never worked as it should for me either. I tried to
use DDE link to Paradox for Windows to retrieve data and it returned
a single record instead of the whole table.
Derek Nguyen
dnguyen@rcp6.elan.af.mil
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