This documentation is archived and is not being maintained.

Compiler Warning (level 4) C4220

varargs matches remaining parameters

Under the default Microsoft extensions (/Ze), a pointer to a function matches a pointer to a function with similar, but variable, arguments.

// C4220.c
// compile with: /W4

int ( *pFunc1) ( int a, ... );
int ( *pFunc2) ( int a, int b);

int main()
   if ( pFunc1 != pFunc2 ) {};  // C4220

Such pointers do not match under ANSI compatibility (/Za).