How do I view printf messages from a DLL called in LabVIEW?

[westke]

I have LV 7.1. I am using a CLN to link in a DLL created with Borland C++ Builder v5.0. The code is written in C and I would like to use printf messages in the debug process. What do I need to do?

[Bob_Y.]

I am not really sure, but I have an idea. I think you need to have code in your dll that open up a message window and direct the printf messages to that window. I have not done this myself, but I do know that printfs don't work on LabVIEW.

Maybe someone else has a better idea.
Bob

[Lycangeek]

Take a look at the manual "Using External Code in LabVIEW". Look for the function DbgPrintf.

[JoeSavage]

I think the easiest thing to do is call OutputDebugString from kernel32.dll. You can catch the output with DbgView, a really handy utility from sysinternals.com.

Good luck,
Joe