Window message values

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VB

I am coding an application in VB (VS-2008). It is a MDI application with one Parent form and many child forms. Child forms can be minimized but can not be Maximized.

I want to know 4 Windows messaging values.
1. What is the WM Value when a child form is shown on MDI Client Area
2. What is the WM Value when a child form is Closed/Disposed.
3. What is the WM Value when a child form is minimized.
4. What is the WM Value when a child form is normalized.

By using WinProc function I could see the Messages but could not differentiate which is for what, If any body can provide me the Window Message values i will be very thankfull.

Thanks.

K. K. Barman
kanoj.k.barman@gmail.com
8th Sep 2020

What I have tried:

<system.security.permissions.permissionsetattribute(system.security.permissions.securityaction.demand, name:="FullTrust" )=""> _
       Protected Overrides Sub WndProc(ByRef m As Message)
        Dim MyRec As Integer = Me.DataGridView1.Rows.Count + 1
        Dim MyString() As String = {MyRec.ToString, m.Msg, m.WParam.ToString, m.LParam.ToString}
        Me.DataGridView1.Rows.Add(MyString)
        'RaiseEvent LBItemAdded()
        ' Listen for operating system messages
        Select Case (m.Msg)
            ' The WM_ACTIVATEAPP message occurs when the application
            ' becomes the active application or becomes inactive.
            Case WM_ACTIVATEAPP
                'MsgBox("App Active." & Chr(13) & _
                '       "Value = " & m.Msg)
                ' The WParam value identifies what is occurring.
                appActive = (m.WParam.ToInt32() <> 0)

                ' Invalidate to get new text painted.
                Me.Invalidate()

        End Select

        MyBase.WndProc(m)
    End Sub