Keep parent form in-focus (modal) when interating with child form?

Hi all,

I have a child form within my form. When I click inside the child form, the parent form (my form) loses focus. How can I prevent this from occurring and maintain focus of main parent form even if clicking in child form?

Just to clarify what I mean by "in-focus", this picture demonstrates a focused form (the one at the front), and a form that's not in focus (the one at the back):
http://www.functionx.com/vcsharp/images/modal1.gif

Thanks in advance. :D

My code:

<pre>Imports System.Runtime.InteropServices
Public Class Form1

    Private Const WM_SYSCOMMAND As Integer = &H112
    Private Const SC_MAXIMIZE As Integer = &HF030

    <DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)>
    Public Shared Function SetParent(ByVal hWndChild As IntPtr, ByVal hWndNewParent As IntPtr) As IntPtr
    End Function

    <DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)>
    Friend Shared Function SendMessage(ByVal hWnd As IntPtr, ByVal Msg As UInteger, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr
    End Function

    Private Sub SetChildTimer1_Tick(sender As Object, e As EventArgs) Handles SetChildTimer1.Tick

        Dim NtPdProcess As Process = Process.GetProcessesByName("notepad").FirstOrDefault

        If NtPdProcess IsNot Nothing Then

            SetParent(NtPdProcess.MainWindowHandle, Panel1.Handle)
            SendMessage(NtPdProcess.MainWindowHandle, WM_SYSCOMMAND, SC_MAXIMIZE, 0)

        End If

    End Sub

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Dim startInfo As New ProcessStartInfo("notepad.exe")
        Process.Start(startInfo)
    End Sub
End Class

What I have tried:

I've tried experimenting with ZOrder, but frankly, I'm not very experienced yet.
I've tried experimenting with ShowDialog's, to no avail.

Tags: Visual Basic