DLLS sharing data between programs.

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2 total messages Started by A E Ram aut Thu, 16 Apr 1992 18:26

#437

Author: A E Ram aut
Date: Thu, 16 Apr 1992 18:26

9 lines
719 bytes

Is it safe for one program using a Dll to store data using one of the
Dll's functions (e.g. SetNumber(n:integer) ) and then for another
program, also using the Dll to retrieve it with the reverse funcion.
This would be a useful alternative to using DDE messages for transfering
data between two specific programs.  I have tried it and works but is it
safe in all circumstances?

Thanks,
Andrew.

Re: DLLS sharing data between programs.

#442

Author: Rick Masters
Date: Thu, 16 Apr 1992 19:34

21 lines
1241 bytes

It is completely safe to use a DLL's data segment to share
information between applications. The tricky part is
notifying the other app that new data is available.

For those of you who will receive the 3.1 SDK I encourage
you to look into the new DDEML.DLL library for using DDE
to perform interapp communication.

I hated DDE and now it is almost fun since the new library
eliminates ALL the dirty work.

DDEML is completely compatible with the older message based
DDE. You supply DDEML with a callback function and it calls
you with several informative parameters when some 
DDE thing is happening.

It also provides a nifty Abort, retry ignore dialog when
transactions are taking too long.

Rick Masters

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