如何用API播放CD
How to play a CD Audio disc via API
Declare the following API
Declare Function mciSendString& Lib "MMSYSTEM" (ByVal lpstrCommand$,
ByVal lpstrReturnStr As Any, ByVal wReturnLen%, ByVal hCallBack%)
Add the code below to appropriate routines
Sub cmdPlay_Click ()
Dim lRet As Long
Dim nCurrentTrack As Integer
Open the device
lRet = mciSendString("open cdaudio alias cd wait", 0&, 0, 0)
Set the time format to Tracks (default is milliseconds)
lRet = mciSendString("set cd time format tmsf", 0&, 0, 0)
Then to play from the beginning
lRet = mciSendString("play cd", 0&, 0, 0)
Or to play from a specific track, say track 4
nCurrentTrack = 4
lRet = mciSendString("play cd from" & Str(nCurrentTrack), 0&, 0, 0)
End Sub
Remember to Close the device when ending playback
Sub cmdStop_Click ()
Dim lRet As Long
Stop the playback
lRet = mciSendString("stop cd wait", 0&, 0, 0)
DoEvents Let Windows process the event
Close the device
lRet = mciSendString("close cd", 0&, 0, 0)
End Sub
