A problem about LabVIEW calling C program

[CZUJYJ]

After compiling the DLL dynamic library file, I call the C program through the "call library function node". However, after selecting the file, the following problem occurs:

Prompt: the selected file is not a legal library.

I don't know what the problem is. I hope I can get your help.

[rolfk]

Is this on the same system that you used to compile the DLL?

Is this really a C(++) DLL or rather a .Net assembly?

Even Dependency Walker claims that it is not a valid COFF PE file format. So something in your build steps is very much wrong.

If you open the DLL file in a text editor it simply is an INI style file!

[zou]

Are you using Windows OS?

Is your dll built on Windows?