I am having great difficulties sending a message from one application to
another on a NT machine (NT 4.0 service patch 2).

The same two applications communicates fine on a Win95 machine.

I have tried various methods from DDE, WM_COPYDATA to user registered
messages to no success.

I am using VC 5.0 without the patch.

If anyone can shed any light on this matter, I would be very grateful
Many thanks in advance,
Andrew Nyunt

Andrew,

If you are trying to trigger events -- why not use synchronization
objects liek mutexes or events.  If you neeed to share data try memory
mapped files or shared memory or named pipes.

Charles Steinhardt[MVP]