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The specified device is not open or not recognized by MCI -"mciSendStringA", VBA
The following is the code (Form_Load), executed from MS Excel (and MS
Word). The "sndPlaySoundA" function from the "winmm.dll" works fine. What am I missing? Thanks Public Declare Function mciSendString Lib "winmm.dll" Alias "mciSendStringA" (ByVal _ lpszCommand As String, ByVal lpszReturnString As String, ByVal cchReturnLength _ As Long, ByVal hwndCallback As Long) As Long Public Declare Function mciGetErrorString Lib "winmm.dll" Alias "mciGetErrorStringA" (ByVal _ fdwError As Long, ByVal lpszErrorText As String, ByVal cchErrorText As Long) As Long ' cribbed from code for playing a MIDI file ' Use the MCI to play or stop playback of a MIDI file. The file C: \Music\canyon.mid ' is opened when the form opens. The Play and Stop buttons behave as you'd expect. The ' only potential surprise is that the current position is not reset when playback stops; it ' behaves just as pausing playback would. The file closes when the form unloads. ' If anything goes wrong in the example, display a message box with ' the MCI error message text. Sub Form_Load() ' Open the file "C:\Music\canyon.mid" for later use in the example. ' Give it an alias of "canyon" so we don't need to refer to the filename again. Dim errcode As Long ' MCI error code errcode = mciSendString("open D:\Documents and Settings\me\Desktop \test.wav", "", 0, 0) If errcode < 0 Then DisplayError errcode End Sub Sub cmdPlay_Click() ' Begin playback of the MIDI file when this button is pressed. Dim errcode As Long ' MCI error code errcode = mciSendString("play canyon", "", 0, 0) If errcode < 0 Then DisplayError errcode End Sub Sub cmdStop_Click() ' Stop playback of the MIDI file when this button is pressed. ' The position within the file does not move back to the beginning. Dim errcode As Long ' MCI error code errcode = mciSendString("stop canyon", "", 0, 0) If errcode < 0 Then DisplayError errcode End Sub Sub Form_Unload(Cancel As Integer) ' Close the MIDI file when the form unloads. This is important, because the ' MIDI driver can only work with one file at a time. There's no need to check ' for an error here, since we're just closing the file. Dim errcode As Long ' MCI error code errcode = mciSendString("close canyon", "", 0, 0) End Sub Sub DisplayError(ByVal errcode As Long) ' This subroutine displays a dialog box with the text of the MCI error. There's ' no reason to use the MessageBox API function; VB's MsgBox function will suffice. Dim errstr As String ' MCI error message text Dim retval As Long ' return value ' Get a string explaining the MCI error. errstr = Space(128) retval = mciGetErrorString(errcode, errstr, Len(errstr)) ' Remove the terminating null and empty space at the end. errstr = Left(errstr, InStr(errstr, vbNullChar) - 1) ' Display a simple error message box. retval = MsgBox(errstr, vbOKOnly Or vbCritical) End Sub |
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