openFile01.ps1

Add-Type -AssemblyName System.Windows.Forms

$FileBrowser = New-Object System.Windows.Forms.OpenFileDialog -Property @{
    InitialDirectory = [Environment]::GetFolderPath('Desktop')
    #Filter = 'Documents (*.docx)|*.docx|SpreadSheet (*.xlsx)|*.xlsx'
}
$null = $FileBrowser.ShowDialog()
$FileBrowser.FileName