cannot solve this problem in compiling

[Sergio Villone <s.villone@xxxxxxxxxxxx>]

I just cannot manage to understand why the statement:
typedef int (FACopyProgressProc)(long par, long value, long max);


gives the error:
 error: two or more data types in declaration of `FACopyProgressProc'
and not once but four times for the same line...
this with gcc 3.3 under mac os X
can anybody help me?
TIA
Sergio