powershell form picture box function not working - forms

Question

I have the following code that I can run outside of a function and it works just fine.
I am trying to make a form that will be displaying multiple images so I need to format it into a function.
Add-Type -AssemblyName System.Windows.Forms, System.Drawing
[System.Windows.Forms.Application]::EnableVisualStyles()
$Form = New-Object system.Windows.Forms.Form
$Form.StartPosition = "CenterScreen"
$Form.Size = New-Object System.Drawing.Point(800,800)
$Form.text = "Example Form"
$Form.TopMost = $false
$Form.MaximumSize = $Form.Size
$Form.MinimumSize = $Form.Size
$Picture = (get-item ("C:\Users\User\Desktop\t.png"))
$img = [System.Drawing.Image]::Fromfile($Picture)
$pictureBox = new-object Windows.Forms.PictureBox
$pictureBox.Width = $img.Size.Width
$pictureBox.Height = $img.Size.Height
$pictureBox.Image = $img
$pictureBox.Location = [Drawing.Point]::new(15, 15)
$Form.controls.add($pictureBox)
$Form.ShowDialog()
but when I tried to assemble this as a function it is not working
Add-Type -AssemblyName System.Windows.Forms, System.Drawing
[System.Windows.Forms.Application]::EnableVisualStyles()
$Form = New-Object system.Windows.Forms.Form
$Form.StartPosition = "CenterScreen"
$Form.Size = New-Object System.Drawing.Point(800,800)
$Form.text = "Example Form"
$Form.TopMost = $false
$Form.MaximumSize = $Form.Size
$Form.MinimumSize = $Form.Size
function pictureBox {
[CmdletBinding()]
param (
[Parameter (Mandatory = $True)]
[string] $p,
[Parameter (Mandatory = $True)]
[int] $lx,
[Parameter (Mandatory = $True)]
[int] $ly
)
$Picture = (get-item ($p))
$img = [System.Drawing.Image]::Fromfile($Picture)
$pictureBox = new-object Windows.Forms.PictureBox
$pictureBox.Size = [Drawing.Size]::new($img.Size.Width,$img.Size.Height)
$pictureBox.Location = [Drawing.Point]::new($lx, $ly)
$pictureBox.Image = $img
}
$v1 = pictureBox -p "C:\Users\User\Desktop\t.png" -lx 15 -ly 15
$Form.controls.add($v1)
$Form.ShowDialog()
What am I doing wrong?

Answer 1

Your function pictureBox is not returning anything, it creates a new PictureBox instance, updates it's properties but then that object is never outputted, hence $v1 gets assigned AutomationNull.Value.
# Same code for creating the Form here
function pictureBox {
[CmdletBinding()]
param (
[Parameter (Mandatory = $True)]
[string] $p,
[Parameter (Mandatory = $True)]
[int] $lx,
[Parameter (Mandatory = $True)]
[int] $ly
)
$img = [Drawing.Image]::Fromfile($PSCmdlet.GetUnresolvedProviderPathFromPSPath($p))
[Windows.Forms.PictureBox]#{
Size = [Drawing.Size]::new($img.Size.Width, $img.Size.Height)
Location = [Drawing.Point]::new($lx, $ly)
Image = $img
}
}
$v1 = pictureBox -p "C:\Users\User\Desktop\t.png" -lx 15 -ly 15
$Form.controls.add($v1)
$Form.ShowDialog()