[Google63]

Well here how It's done in Assembly( i tested with random and worked ):

Код:

typedef unsigned long DWORD;

bool vm_IsPlayerConnected(int playerid)
{
  DWORD
    ADDR_IsPlayerConnected = 0x4637E0;
  bool
    value = false;
  _asm
  {
    push playerid
    call ADDR_IsPlayerConnected
    mov value, eax
  }
  return value;
}

If you have more then 1 param then push it in reverse order( that's how stack works )

If you have any problem, tell...

EDIT:

NOTE: C++ standard says that return value from function must always be in "eax", I dont think C standard says same... but SAMP is written in C++ so you dont have to worry :P