How do I properly return a char * from an Unmanaged DLL to C#?

Question

Function signature:

char * errMessage(int err);

My code:

[DllImport(\"api.dll\")]       
internal static extern char[] errMessage(int err);         


        

Answer 1

See this question. To summary, the function should return an IntPtr and you have to use Marshal.PtrToString* to convert it to a managed String object.