Lesson 22: Creating Multimedia Applications-Part IV: A Multimedia Player

In lesson 20, we have created an audio player. Now, by making more modifications, you can transform the audio player into a multimedia player. This player will be able to search for all 
types of movie files and audio files in your drives and play them. 

In this project, you need to insert a ComboBox, a DriveListBox, a DirListBox, a TextBox ,a FileListBox  and a picture box (for playing movie) into your form. I Shall briefly discuss the function of each of the above controls. Besides, you must also insert Microsoft Multimedia Control(MMControl) into your form , you may make it visible or invisible. In my program, I choose to make it invisible so that I could use the command buttons created to control the player.

• ComboBox- to display and enable selection of different type of files.
• DriveListBox- to allow selection selection of different drives available on your PC.
• DirListBox - To display directories
• TextBox - To display selected files
• FileListBox- To display files that are available

Relevant codes must be written to coordinate all the above controls so 
that the application can work properly. The program should flow in the 
following logical way:

Step 1: User chooses the type of files he wants to play.
Step2:User selects the drive that might contains the relevant audio files.
Step 3:User looks into directories and subdirectories for the files specified in step1. The files should be displayed in the  FileListBox.
Step 4:  User selects the files from the FileListBox and clicks the Play button.
Step 5: User clicks on the Stop button to stop playing and Exit button to end the application.
 

The Interface

The Code

Private Sub Form_Load()

'To fix the player size
Left = (Screen.Width - Width) \ 2
Top = (Screen.Height - Height) \ 2
Combo1.Text = "*.wav"
Combo1.AddItem "*.wav"
Combo1.AddItem "*.mid"
Combo1.AddItem "*.avi;*.mpg"
Combo1.AddItem "All files"

End Sub

Private Sub Combo1_Change()

        'To select types of media files

If ListIndex = 0 Then
File1.Pattern = ("*.wav")
ElseIf ListIndex = 1 Then
File1.Pattern = ("*.mid")
ElseIf ListIndex = 2 Then
File1.Pattern = ("*.avi;*.mpg")
Else
Fiel1.Pattern = ("*.*")
End If

End Sub

Private Sub Dir1_Change()

      'To search the directories or folders for the media files

File1.Path = Dir1.Path
If Combo1.ListIndex = 0 Then
File1.Pattern = ("*.wav")
ElseIf Combo1.ListIndex = 1 Then
File1.Pattern = ("*.mid")
ElseIf Combo1.ListIndex = 2 Then
File1.Pattern = ("*.avi;*.mpg")
Else
File1.Pattern = ("*.*")
End If

End Sub

Private Sub Drive1_Change()

'To Change Drives

Dir1.Path = Drive1.Drive

End Sub


Private Sub File1_Click()

'To load the selected file

If Combo1.ListIndex = 0 Then
File1.Pattern = ("*.wav")
ElseIf Combo1.ListIndex = 1 Then
File1.Pattern = ("*.mid")
ElseIf Combo1.ListIndex = 2 Then
File1.Pattern = ("*.avi;*.mpg")
Else
File1.Pattern = ("*.*")
End If

If Right(File1.Path, 1) <> "\" Then
filenam = File1.Path + "\" + File1.FileName
Else
filenam = File1.Path + File1.FileName
End If
Text1.Text = filenam

End Sub

Private Sub play_Click()

MMPlayer.FileName = Text1.Text
MMPlayer.Command = "Open"
MMPlayer.Command = "Play"
MMPlayer.hWndDisplay = videoscreen.hWnd

End Sub


Private Sub stop_Click()

If MMPlayer.Mode = 524 Then Exit Sub
If MMPlayer.Mode <> 525 Then
MMPlayer.Wait = True
MMPlayer.Command = "Stop"
End If
MMPlayer.Wait = True
MMPlayer.Command = "Close"

End Sub

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