Question Possible de rester sur une unique fenètre dans une application windows form ?

Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing

$form = New-Object System.Windows.Forms.Form
$form.Text = 'Data Entry Form'
$form.Size = New-Object System.Drawing.Size(600,400)
$form.StartPosition = 'CenterScreen'

$TabControl = New-Object System.Windows.Forms.TabControl
$TabControl.Size = [System.Drawing.Size]::new(600,400)
#region For Hide Header
$TabControl.Appearance = [System.Windows.Forms.TabAppearance]::FlatButtons
$TabControl.ItemSize = [System.Drawing.Size]::new(0,1)
$TabControl.SizeMode = [System.Windows.Forms.TabSizeMode]::Fixed
#endregion For Hide Header
$form.Controls.Add($TabControl)

$TabPage1 = New-Object System.Windows.Forms.TabPage
$TabPage1.BackColor = "Red"
$TabControl.Controls.Add($TabPage1)

$TabPage2 = New-Object System.Windows.Forms.TabPage
$TabPage2.BackColor = "Green"
$TabControl.Controls.Add($TabPage2)

$tablabel1 = New-Object System.Windows.Forms.Label
$tablabel1.Text = "TabPage 1"
$tablabel1.Location = [System.Drawing.Point]::new(250,150)
$TabPage1.Controls.Add($tablabel1)

$tablabel2 = New-Object System.Windows.Forms.Label
$tablabel2.Text = "TabPage 2"
$tablabel2.Location = [System.Drawing.Point]::new(250,150)
$TabPage2.Controls.Add($tablabel2)

$tabButton1 = New-Object System.Windows.Forms.Button
$tabButton1.Size = [System.Drawing.Size]::new(100,50)
$tabButton1.Location = [System.Drawing.Point]::new(250,300)
$tabButton1.Text = "Suivant"
$tabButton1.add_Click{
    $TabControl.SelectTab(1)
}
$TabPage1.Controls.Add($tabButton1)

$tabButton2 = New-Object System.Windows.Forms.Button
$tabButton2.Size = [System.Drawing.Size]::new(100,50)
$tabButton2.Location = [System.Drawing.Point]::new(250,300)
$tabButton2.Text = "Précédent"
$tabButton2.add_Click{
    $TabControl.SelectTab(0)
}
$TabPage2.Controls.Add($tabButton2)

$form.Topmost = $true

$result = $form.ShowDialog()