I set ControlBox = False on all my Children forms at design time. When any of Child form is loaded into MDI, its Title Bar appears for 0.3-0.5 sec making the application look not clear enough.
I found this code via Google:

Declare Function FindWindow& Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String)
Declare Function SetWindowPos Lib "user32" (ByVal hWnd As Long, ByVal hWndInsertAfter As Long, ByVal X As Long, ByVal Y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long

Public Sub HideTaskBar()
Dim taskWindow As IntPtr = FindWindow("HHTaskBar", Nothing)
If Not taskWindow = IntPtr.Zero Then

'SWP_NOZORDER = &H4
SetWindowPos(taskWindow, IntPtr.Zero, 0, 0, 0, 0, &H4)
End If

End Sub

But it produces an error on the first line in HideTaskBar Sub.

I'm looking for help either with this Sub or with complete hiding the title bar by any other way.

Thank you
Vlad