سلام
[System.Runtime.InteropServices.DllImport("winmm")]
static extern long mciSendString(string lpstrCommand, string lpstrReturnString, long uReturnLength, long hwndCallback);
mciSendString("Set CDAudio Door Open Wait", "0", 0, 0);
اینم برای بستن
mciSendString("Set CDAudio Door Closed Wait", "0", 0, 0);