帮帮忙看这段代码!!!

[karykwan]

#include <mmsystem.h>
#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::FormCreate(TObject *Sender)
{
mciSendString("open cdaudio alias cd wait shareable",0,0,0);
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)
{
mciSendString("set cd door open",0,0,0);
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button2Click(TObject *Sender)
{
mciSendString("set cd door closed",0,0,0);
}
//---------------------------------------------------------------------------
控制光驱的开关的,但不行.为什么啊?本人急用!!!!

[chifengwatch]

//---------------------------------------------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)
{
mciSendString("Set cdaudio door open wait", NULL, 0, Handle);
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button2Click(TObject *Sender)
{
mciSendString("Set cdaudio door closed wait", NULL, 0, Handle);
}
//---------------------------------------------------------------------------

[karykwan]

还是不行啊,它提示是mmsystem.h文件里有问题啊?