How to hide 'Minimize', 'Maximize' and 'Close' buttons from PrismUserControl WPF?
<p>In my Prism 6 WPF MVVM application I use the following PrismUserControl WPF for displaying of modal notification dialogs:</p>

<pre><code>&lt;UserControl x:Class="CommonWpfControlLibrary.NotificationDialogPopupView"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
         xmlns:prism="http://prismlibrary.com/"             
         prism:ViewModelLocator.AutoWireViewModel="True"
         mc:Ignorable="d" 
         d:DesignHeight="300" d:DesignWidth="300" MaxHeight="300" MaxWidth="600"&gt;

    &lt;StackPanel Orientation="Vertical" Margin="20"&gt;
        &lt;TextBlock Text="{Binding Message}" TextWrapping="Wrap"/&gt;
        &lt;telerik:RadButton Content="OK" Command="{Binding OnOkPressedCommand}" HorizontalAlignment="Center" Width="50" Margin="0 10 0 0"/&gt;
    &lt;/StackPanel&gt;
&lt;/UserControl&gt;
</code></pre>

<p>In the Views where I use this UserControl as a modal dialog content I define it as following:</p>

<pre><code>&lt;i:Interaction.Triggers&gt;
    &lt;prism:InteractionRequestTrigger SourceObject="{Binding NotificationRequest, Mode=OneWay}"&gt;
        &lt;prism:PopupWindowAction IsModal="True" CenterOverAssociatedObject="True"&gt;
            &lt;prism:PopupWindowAction.WindowContent&gt;
                &lt;commonControls:NotificationDialogPopupView/&gt;
            &lt;/prism:PopupWindowAction.WindowContent&gt;
        &lt;/prism:PopupWindowAction&gt;
    &lt;/prism:InteractionRequestTrigger&gt;
&lt;/i:Interaction.Triggers&gt;
</code></pre>

<p>When I activate the dialog it is displayed, for example, as the following:
<a href="https://i.stack.imgur.com/E3z5z.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/E3z5z.png" alt="enter image description here"></a></p>

<p>But as you can see 'Minimize', 'Maximize' and 'Close' buttons are visible and enabled. And the system menu (activated in upper left corner of the dialog) is enabled too. <strong>How can I hide 'Minimize', 'Maximize' and 'Close' buttons and disable the system menu?</strong></p>