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i have a main form with a button named (Open videos), when clicked
a second form (form2) will open like this:[^]

form2 has a combobox which has a list of videos
if any item of this combobox is selected, a video start playing
also full screen mode is working fine
but when form2 become (child form) to form1
video isn't scaled right also full screen mode doesn't work like this:[^]

this is the code of form1 to make it parent

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

and this is code of form2 to play videos:

<pre>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

What I have tried:

tried a different code with no success:

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)
    AxWindowsMediaPlayer1.URL = (TheFIlePath)

End If

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