Interprocess Communication C++ - LabView

[Porrm]

Hi,

I have a C++ *.exe file wich is grabbing images with a Matrox framegrabber. This program ist startet via "system exec" from LabView. I want to do a kind of time measurement with this program so i need the exact time when the grabbing of frame starts. At the moment I dont know how long the *.exe file needs to initialize the framegrabber (something about 500-1000ms).

My idea is to start a continous grabbing but start saving the images when another command via LabView will be send to the C++ application. But I don't know how to send this command! It should be a kind of a "wait until key pressed" controlled by LabView. Maybe a global bolean or something like that.

I hope somebody can help me!

(programming with LabView 7.0 and Visual C++ 2003.NET)

[UM]

Hi,

What you are looking for is called an “inter-application communication”.
There are several options to realize it. LabVIEW supports TCP/IP, ActiveX or UDP to communicate with another application.  So it’s not as simple as using a “global Boolean” as you mentioned.
I advise you, to use the LabVIEW examples which shipped with the NI example finder to get some programs as reference. Search for keywords like TCP/IP, ActiveX and UDP.
Attached you’ll find a link to a knowledgebase.
Hope this helps.
How Do I Use LabVIEW to Communicate with Other Applications?
http://digital.ni.com/public.nsf/allkb/B3959ED76D55A9E586256965004D8092?OpenDocument Regards,
Ulrich
AE NICER

[Porrm]

Thanks for your answer! I started implementing a TCP solution with winsock2 yesterday. The LabView part was very easy took 5 min, but to read all the stuff for C++ takes time.