Need some suggestions.

[BubbaGeeNH]

Currently have a VB6.0 program that is used to monitor/control a device via a serial connection. It is constantly polling the device to keep data up to date and to keep the communication link active. My problem is finding a reliable way to access the data via an external program (written in C++)(ProgC++). The previous programmer has been using "SendMessage" to send information to the VB6.0 program(ProgVB) and setup portions of device but his way of addressing getting information back from the program doesn't work. He was trying to use a similiar "SendMessage" approach but didn't take into account that the SendMessage from ProgC++ until the SendMessage from ProgVB finishes and that will only finish once ProgC++ reads it and acts on it. So it gets stuck in a cycle where neither program will run until the other finishes. Thought of using PostMessage but run into the issue where the data may not be valid in time for me to use it since PostMessage never reports when the message has been handled like SendMessage does. Is there a way to build external subroutines into VB6.0 that I can access from outside of the program? Thanks, George

[Dave Kreskowiak]

SendMessage is the poor-mans hack to IPC. I suggest using REAL Interprocess Communication. There's probably some IPC component out on the web somewhere. I just don't know of any off the top of my head. I stopped using VB6 6 years ago.

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Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
     2006, 2007

[Christian Graus]

Dave Kreskowiak wrote:

VB6 6 years ago.

Took me a second to realise that wasn't a typo...

Christian Graus - Microsoft MVP - C++ "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )