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I've read the "Mixing assembly and C" guide and I wonder why ebp is used.

The following code is from the guide:

_myfunc:  push ebp
          mov ebp,esp
          sub esp,0x40           ; 64 bytes of local stack space
          mov ebx,[ebp+8]        ; first parameter to function
          ; some more code
          leave                  ; mov esp,ebp / pop ebp
          ret

So my questions are
1: Is ebp needed at all?, can't I just use esp
2: If ebp is not needed, why does it show up in all code examples?
   I guess it is somewhat easier for an assembly programmer to use it, but why does DJGPP use it?

This is what ebp was designed for, and it simply makes things easier.

esp will change values throughout your proceedure, no doubt; any push or pop will effect all your locations, and make it difficult to code.

Jeff