Seems to work fine for me... used www.poshgui.com to create the form

Add-Type -AssemblyName System.Windows.Forms
[System.Windows.Forms.Application]::EnableVisualStyles()

$Form                            = New-Object system.Windows.Forms.Form
$Form.ClientSize                 = New-Object System.Drawing.Point(462,245)
$Form.text                       = "Form"
$Form.TopMost                    = $false
$Form.BackColor                  = [System.Drawing.ColorTranslator]::FromHtml("#222222")
$Form.ForeColor                  = [System.Drawing.ColorTranslator]::FromHtml("#c5c9ca")

$Label1                          = New-Object system.Windows.Forms.Label
$Label1.text                     = "label"
$Label1.AutoSize                 = $true
$Label1.width                    = 25
$Label1.height                   = 10
$Label1.location                 = New-Object System.Drawing.Point(42,55)
$Label1.Font                     = New-Object System.Drawing.Font('Microsoft Sans Serif',10)
$Label1.ForeColor                = [System.Drawing.ColorTranslator]::FromHtml("#c5c9ca")

$Form.controls.Add($Label1)

$form.ShowDialog()