Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing
$form = New-Object System.Windows.Forms.Form
$form.Text = "PowerShell RTF 表示するやつ"
$richTextBox = New-Object System.Windows.Forms.RichTextBox
$richTextBox.Dock = "Fill"
$richTextBox.LoadFile("sdk_license.rtf", [System.Windows.Forms.RichTextBoxStreamType]::RichText)
$form.Controls.Add($richTextBox)
[System.Windows.Forms.Application]::Run($form)