Library tutorials & articles
Build an MP3 Player
By ElementK Journals, published on 14 Jul 2001
Playing Time
Determining the song's duration
Now that the code has opened the file, we can determine its duration. Whenever a file's open state changes, Media Player triggers an OpenStateChange() event. We'll use this event to calculate the song's duration. Listing D shows this event. As you can see, this event also sets the FileOpen variable.
Listing D: Calculating the duration
Private Sub MediaPlayer1_OpenStateChange(ByVal _
OldState As Long, ByVal NewState As Long)
Min = MediaPlayer1.Duration * 60
Sec = MediaPlayer1.Duration - (Min * 60)
lblTotalTime = "Total Time: " & Format(Min, "0#") _
& ":" & Format(Sec, "0#") 'format time to 00:00
FileOpen = CBool(NewState)
End Sub
Keeping track of play time
As one of our final touchups to the application, we can provide the current running time. Earlier, we placed two labels and a timer control on the form for just such a purpose. Listing E contains the code for this feature.
Listing E: Displaying the elapsed time
Private Sub Timer1_Timer() Min = MediaPlayer1.CurrentPosition * 60 Sec = MediaPlayer1.CurrentPosition - (Min * 60) If Min > 0 Or Sec > 0 Then lblElapsedTime = "Elapsed Time: " & Format(Min, "0#") _ & ":" & Format(Sec, "0#") Else lblElapsedTime = "Elapsed Time: 00:00" End If End Sub
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