Windows Media Player Problem in mdi child form

Question

i have 2 forms (form1) and (form2), form2 has media player and combobox to choose video this is the code:

Public Class Form2
  Private Sub ComboBox1_SelectedIndexChanged(sender As Object, e As EventArgs) Handles ComboBox1.SelectedIndexChanged
    If ComboBox1.SelectedItem = "Video 1" Then    
      On Error Resume Next
      IO.File.WriteAllBytes(IO.Path.GetTempPath & "\Video 1.mp4", My.Resources.Video_2)
      AxWindowsMediaPlayer1.URL = IO.Path.GetTempPath & "\Video 1.mp4"
      IO.File.Delete(IO.Path.GetTempPath & "\Video 1.mp4")
    End If

    If ComboBox1.SelectedItem = "Video 2" Then
      On Error Resume Next
      IO.File.WriteAllBytes(IO.Path.GetTempPath & "\Video 2.mp4", My.Resources.Video_2)
       AxWindowsMediaPlayer1.URL = IO.Path.GetTempPath & "\Video 2.mp4"
       IO.File.Delete(IO.Path.GetTempPath & "\Video 2.mp4")
    End If

    If ComboBox1.SelectedItem = "Video 3" Then
      On Error Resume Next
      IO.File.WriteAllBytes(IO.Path.GetTempPath & "\Video 3.mp4", My.Resources.Video_3)
      AxWindowsMediaPlayer1.URL = IO.Path.GetTempPath & "\Video 3.mp4"
      IO.File.Delete(IO.Path.GetTempPath & "\Video 3.mp4")
    End If
  End Sub
End Class

this code works fine until i changed (form1) to be parent and (form2) to be child with this code:

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
  Form2.StartPosition = FormStartPosition.Manual
  Form2.Left = 105
  Form2.Top = 50
  Form2.MdiParent = Me
End Sub

video isn't viewed right (only part of it) as if the video is larger than media player screen also full screen mode isn't working at all. this is another trial with no progress:

If ComboBox1.SelectedItem = "Video 1" Then
  Dim b As Byte() = My.Resources.Video_1
  Dim TheFIlePath As String = "Video 1.mp4"
  Dim TempFile As IO.FileStream = IO.File.Create(TheFIlePath)
  TempFile.Write(b, 0, b.Length)
  TempFile.Close()
  AxWindowsMediaPlayer1.URL = (TheFIlePath)
End If

i tried both true and false for stretchtofit also tried with (Try and Catch exception) like this:

If ComboBox1.SelectedItem = "Video 1" Then

    Try
        AxWindowsMediaPlayer1.URL = "D:\40.mp4"
    Catch ex As Exception
        MsgBox(ex.Message)
    End Try

End If

with no success, this is the video screenshot when it is playing well:

and this is when form2 became mdi child:

Answer 1

After a lot of search, i found that windows media player cannot be played full screen in mdi child form.

so instead of using mdi child form, i replaced it with a panel and AxWindowsMediaPlayer was added, the fullscreen property is now working fine and the video is scaled fine.