by Anonymous (267 Submissions)
Category: Sound/MP3
Compatability: Visual Basic 4.0 (32-bit)
Difficulty: Unknown Difficulty
Originally Published: Sun 23rd May 1999
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
Various routines for controlling a music CD on your computer. Includes Play, setting track number, pausing, opening/closing CD door,etc.
API Declarations
Private Declare Function mciSendString Lib "winmm.dll" Alias "mciSendStringA" (ByVal lpstrCommand As String, ByVal lpstrReturnString As String, ByVal uReturnLength As Long, ByVal hwndCallback As Long) As Long
VBcoders
mciSendString "play cd", 0, 0, 0
End Function
Function SetTrack(Track%)
mciSendString "seek cd to " & Str(Track), 0, 0, 0
End Function
Function StopPlay()
mciSendString "stop cd wait", 0, 0, 0
End Function
Function PausePlay()
mciSendString "pause cd", 0, 0, 0
End Function
Function EjectCD()
mciSendString "set cd door open", 0, 0, 0
End Function
Function CloseCD()
mciSendString "set cd door closed", 0, 0, 0
End Function
Function UnloadAll()
mciSendString "close all", 0, 0, 0
End Function
Function SetCDPlayerReady()
mciSendString "open cdaudio alias cd wait shareable", 0, 0, 0
End Function
Function SetFormat_tmsf()
mciSendString "set cd time format tmsf wait", 0, 0, 0
End Function
Function SetFormat_milliseconds()
mciSendString "set cd time format milliseconds", 0, 0, 0
End Function
Function CheckCD%()
Dim s As String * 30
mciSendString "status cd media present", s, Len(s), 0
CheckCD = s
End Function
Function GetNumTracks%()
Dim s As String * 30
mciSendString "status cd number of tracks wait", s, Len(s), 0
GetNumTracks = CInt(Mid$(s, 1, 2))
End Function
Function GetCDLength$()
Dim s As String * 30
mciSendString "status cd length wait", s, Len(s), 0
GetCDLength = s
End Function
Function GetTrackLength$(TrackNum%)
Dim s As String * 30
mciSendString "status cd length track " & TrackNum, s, Len(s), 0
GetTrackLength = s
End Function
Sub GetCDPosition(Track%, Min%, Sec%)
Dim s As String * 30
mciSendString "status cd position", s, Len(s), 0
Track = CInt(Mid$(s, 1, 2))
Min = CInt(Mid$(s, 4, 2))
Sec = CInt(Mid$(s, 7, 2))
End Sub
Function CheckIfPlaying%()
CheckIfPlaying = 0
Dim s As String * 30
mciSendString "status cd mode", s, Len(s), 0
If Mid$(s, 1, 7) = "playing" Then CheckIfPlaying = 1
End Function
Function SeekCDtoX(Track%)
StopPlay
SetTrack Track
StartPlay
End Function
Function ReadyDevice()
UnloadAll
SetCDPlayerReady
SetFormat_tmsf
End Function
Function FastForward(Spd%)
Dim s As String * 40
SetFormat_milliseconds
mciSendString "status cd position wait", s, Len(s), 0
CheckIfPlaying%
If CheckIfPlaying = 1 Then
mciSendString "play cd from " & CStr(CLng(s) + Spd), 0, 0, 0
Else
mciSendString "seek cd to " & CStr(CLng(s) + Spd), 0, 0, 0
End If
SetFormat_tmsf
End Function
Function ReWind(Spd%)
Dim s As String * 40
SetFormat_milliseconds
mciSendString "status cd position wait", s, Len(s), 0
CheckIfPlaying%
If CheckIfPlaying = 1 Then
mciSendString "play cd from " & CStr(CLng(s) - Spd), 0, 0, 0
Else
mciSendString "seek cd to " & CStr(CLng(s) - Spd), 0, 0, 0
End If
SetFormat_tmsf
End Function
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