This code will make your form normal from a maximised state.
Picturebox represent the maximise button and e.keys11 will make normal state on the desktop.
Private Sub PictureBox7_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
Me.WindowState = FormWindowState.Maximized
End Sub
Private Sub WebBrowser1_PreviewKeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.PreviewKeyDownEventArgs) Handles WebBrowser1.PreviewKeyDown
If e.KeyCode.Equals(Keys.F11) Then
Me.WindowState = FormWindowState.Normal
End If
End Sub