PowerShell и GUI. Это — не сложно

Add-Type -Assembly PresentationFramework
function add($control, $children)
{
   $children | %{ $control.Children.Add($_)} | Out-Null
   $control
}
$w = New-Object System.Windows.Window -prop @{
    SizeToContent = [System.Windows.SizeToContent]::WidthAndHeight;
    Content = add (New-Object System.Windows.Controls.StackPanel) @(        
        add (New-Object System.Windows.Controls.StackPanel -prop @{ Orientation = [System.Windows.Controls.Orientation]::Horizontal}) @(
            New-Object System.Windows.Controls.Button -prop @{Content="Кнопочка A";}
            New-Object System.Windows.Controls.Button -prop @{Content="Кнопочка Б";}
        )
        New-Object System.Windows.Controls.TextBlock -prop @{Text="Текст"}        
        New-Object System.Windows.Controls.Combobox -prop @{ItemsSource=@("Выбор 1", "Выбор 2")}
    );    
}
$w.ShowDialog()

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        Title="Заголовочек" 
        Height="146" Width="205">
    <Grid Height="103" Width="180">
        <Button 
            Content="Кнопочка А" 
            HorizontalAlignment="Left" 
            Margin="12,12,0,0" 
            Name="button1" 
            VerticalAlignment="Top" />
        <Button 
            Content="Кнопочка Б" 
            HorizontalAlignment="Left" 
            Margin="93,12,0,0" 
            Name="button2" 
            VerticalAlignment="Top" />
        <TextBlock 
            HorizontalAlignment="Left" 
            Margin="12,41,0,0" 
            Name="textBlock1" 
            Text="Текст" 
            VerticalAlignment="Top" />
        <ComboBox 
            HorizontalAlignment="Left" 
            Margin="12,70,0,0" 
            Name="comboBox1" VerticalAlignment="Top" 
            >
            <ComboBoxItem Content="Выбор 1" />
            <ComboBoxItem Content="Выбор 2" />
        </ComboBox>
    </Grid>
</Window>