This code calls fmod._FSOUND_Stream_PlayEx@16 with 4 parameters, am i correct?


1002D321 > 6A 00            PUSH 0
1002D323   6A 00            PUSH 0
1002D325   FF7424 10        PUSH DWORD PTR SS:[ESP+10]
1002D329   FF7424 10        PUSH DWORD PTR SS:[ESP+10]
1002D32D   E8 03000000      CALL fmod._FSOUND_Stream_PlayEx@16

But so dos this code, 4 parameters to messagebox........

00381000 > 8B4424 10        MOV EAX,DWORD PTR SS:[ESP+10]
00381004   8B4C24 0C        MOV ECX,DWORD PTR SS:[ESP+C]
00381008   8B5424 08        MOV EDX,DWORD PTR SS:[ESP+8]
0038100C   56               PUSH ESI
0038100D   8B35 F0803800    MOV ESI,DWORD PTR DS:[<&USER32.MessageBo>; USER32.MessageBoxA


Why is the way to pass parameters so different, or is the push command not at all to pass parameters?