Ok, so I'm learning Lesson 10 on First Person Movement on Nehe.gamedev.net OpenGLTutorials. I copied the code and pasted it. I've put down all of the libraries and checked all of the file connections. I get this assertion failure. I'll copy the error message as I see it:

Code:
Debug Assertion Failed! 

Program: E:\Programs\...\OpenGL Tests\Test 6\Test 6\Debug\Test 6.exe 
File: fgets.c 
Line: 60 

Expression: str !=NULL 

For information on how your program can cause an assertion 
failure, see the Visual C++ documentation on asserts.
I hear there is a tool in MVC++ that I can use. What is it? If not, know of any other way to cure my program of this error? I have no idea...