C++ Function

Can someone explain this function?

Code:

---

DWORD CallClassFunction(DWORD function,void* this_pointer,DWORD count,...)
{
        DWORD result;

    _asm
        {
            mov eax,count
        LOOP_START:
                test eax,eax
                je LOOP_END
                mov edx,dword ptr ds:[count+eax*4]
                push edx
                sub eax,1
                jmp LOOP_START
        LOOP_END:
                xor eax,eax
                mov ecx,this_pointer
                call [function]
                mov result,eax
        }

        return result;
}

---

Code:

---

void gItemSystemFor380_ApplyFor380Option(LPOBJ lpObj)
{
        CallClassFunction(0x00404BD8,(void*)0x0C546658,1,lpObj);
}

---

Used to call CItemSystemFor380::ApplyFor380Option.

What I can't understand are these values:

DWORD function: Function offset, .pdb file (OK);
void* this_pointer: ????
DWORD count: ????