Code Analyser / Function Call Map

Hello,

Does anybody know of any tools that come with Visual Studio - or perhaps with Visual Basic itself - that will allow me to analyse a VB application and produce a "map" of the function and sub calls within it.

For example, something that will tell me that function A calls funtions, B, C, and D etc etc.

Alternatively, does anybody know of any third party tools that will allow me to do this.

Thanks in advance...