private int MciSet(int itemType, int item, int dwflags)
{
int err = -1;
StringBuilder buf = new StringBuilder(1000);
MCI_SET_PARMS mciSP = new MCI_SET_PARMS();
if (deviceID > 0)
{
if (itemType == 0)
{
mciSP.dwTimeFormat = item;
err = mciSendCommandA(deviceID, MCI_SET, dwflags, ref mciSP);
}
else if (itemType == 1)
{
mciSP.dwAudio = item;
err = mciSendCommandA(deviceID, MCI_SET, dwflags, ref mciSP);
}
else
{
mciSP.dwSpeed = item;
err = mciSendCommandA(deviceID, MCI_SET, dwflags, ref mciSP);
}
}
return err;
}
/// <summary>
/// 关闭 CD-ROM。
/// </summary>
public void CloseCdRom()
{
if (deviceID > 0 && (devCaps & DevCaps.CanEject) == DevCaps.CanEject)
{
int err = -1;
StringBuilder buf = new StringBuilder(1000);
MCI_SET_PARMS mciSP = new MCI_SET_PARMS();
err = mciSendCommandA(deviceID, MCI_SET, MCI_WAIT | MCI_SET_DOOR_CLOSED, ref mciSP);
if (err != 0)
{
mciGetErrorStringA(err, buf, 1000);
//throw new ApplicationException("关闭 CD-ROM 出错，" + buf.ToString());
}
}
}
private static extern int mciSendCommandA(
Int32 wDeviceID,
UInt32 uMessage,
Int32 dwParam,
ref MCI_SET_PARMS Any);