powershell progressbar in groupbox GUI - powershell

Question

I'm working on a script but for some reason my ProgressBar won't appear in my groupbox.
I tried a lot of different things (like making the groupbox trensparent) but nothing really work.
Here is my code 'simplified' with just the problematic parts.
Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing
[System.Windows.Forms.Application]::EnableVisualStyles()
$Form = New-Object System.Windows.Forms.Form
$Form.ClientSize = ‘345,160’
$Form.Text = " bug progressbar "
$Form.StartPosition = "CenterScreen"
#Functions
Function BDDchoice(){
$BDD = $args[0]
$Label2.Text = "it takes a few seconds"
$ProgressBarcheck = New-Object System.Windows.Forms.ProgressBar
$ProgressBarcheck.Location = New-Object System.Drawing.Point(230,49)
$ProgressBarcheck.Size = New-Object System.Drawing.Size(98, 23)
$ProgressBarcheck.Style = "Marquee"
$ProgressBarcheck.MarqueeAnimationSpeed = 20
$ButtonNEXT1.Hide()
$Form.Controls.Add($ProgressBarcheck);
$job1 ={
sleep 10
$bdd_min = $args[0]
echo $bdd_min
}
Start-Job -ScriptBlock $job1 -ArgumentList $BDD -Name bdd
do { [System.Windows.Forms.Application]::DoEvents() } until ((Get-Job -Name bdd).State -eq "Completed")
Wait-Job -Name bdd
$resultat = Receive-Job -Name bdd -Keep
Get-Job | Remove-Job -Force
$TextBoxBDD.text = $resultat
$ProgressBarcheck.Hide()
$ButtonNEXT1.Visible = $true
$Label2.Text = "BDD:"
}
#variables
$BDDXS = #('SCHEM1','SCHEM2','SCHEM3','SCHEM4')
$BDD1 = 'BDD1'
$BDD2 = 'BDD2'
$BDD3 = 'BDD3'
$BDD4 = 'BDD4'
$BDD = $null
#groupbox
$GroupBoxCREATE = New-Object System.Windows.Forms.GroupBox
$GroupBoxCREATE.Location = New-Object System.Drawing.Point(10,5)
$GroupBoxCREATE.Width = 325
$GroupBoxCREATE.Height = 150
$GroupBoxCREATE.Text = " Create "
#combobox ZONE
$comboBoxTRIG = New-Object System.Windows.Forms.ComboBox
$comboBoxTRIG.Location = New-Object System.Drawing.Point(25, 50)
$comboBoxTRIG.Size = New-Object System.Drawing.Size(200, 200)
foreach($BDDX in $BDDXS)
{
$comboBoxTRIG.Items.add($BDDX)
}
$comboBoxTRIG.Text = "REGION"
$comboBoxTRIG.AutoCompleteMode = "SuggestAppend"
$comboBoxTRIG.AutoCompleteSource = "ListItems"
$comboBoxTRIG.SelectedIndex ="0"
#butons
$ButtonNEXT1 = New-Object System.Windows.Forms.Button
$ButtonNEXT1.Location = New-Object System.Drawing.Point(230,49)
$ButtonNEXT1.Size = New-Object System.Drawing.Size(98, 23)
$ButtonNEXT1.Text = "OK"
$ButtonNEXT1.add_Click({
$zone = $comboBoxTRIG.SelectedItem.ToString()
if ($zone -like "SCHEM1"){
$BDD = $BDD1
}
if ($zone -like "SCHEM2") {
$BDD = $BDD2
}
if ($zone -like "SCHEM3") {
$BDD = $BDD3
}
if ($zone -like "SCHEM4") {
$BDD = $BDD4
}
BDDchoice($BDD)
})
#labels
$Label1 = New-Object System.Windows.Forms.Label
$Label1.Location = New-Object System.Drawing.Point(25,25)
$Label1.Text = "REGION :"
$Label2 = New-Object System.Windows.Forms.Label
$Label2.Location = New-Object System.Drawing.Point(25,80)
$label2.Width = 200
$Label2.Text = "BDD :"
#textbox
$TextBoxBDD = New-Object System.Windows.Forms.TextBox
$TextBoxBDD.Location = New-Object System.Drawing.Point(25,100)
$TextBoxBDD.Width = 200
$TextBoxBDD.ReadOnly = $true
$TextBoxBDD.Text = ""
$TextboxBDD.BackColor = "white"
#list form's butons/lists/combobox
$Form.Controls.AddRange(#($TextBoxBDD))
$Form.controls.AddRange(#($Label1,$Label2))
$Form.controls.AddRange(#($ButtonNEXT1))
$Form.controls.AddRange(#($comboBoxTRIG))
$Form.controls.AddRange(#($GroupBoxCREATE))
$Form.ShowDialog()
i'm interested in any idea.
My coworkers could not find anything but I must admit we are far from expert (i'm still learning and so are they).

Answer 1

$Form.Controls.Add($ProgressBarcheck);
It looks like you're adding Progress Bar to your form, NOT the groupbox. Add progress bar to groupbox then add groupbox to form.
$GroupBoxCREATE.Controls.Add($ProgressBarcheck);
$Form.Controls.Add($GroupBoxCREATE);