U could get this using the File System Object. Get the Current Line count, then use a loop to iterate to the line above the current line. Use Skip Line to skip all these lines and only read the line above the current line. Basically looping through the line count.
U can then use readline on this line and retrieve the text. Use Split/mid etc on the text and retrieve the function name.
I think u can write a function to do this task and call that as the statement next to function defination.