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how to stop right click on TtitleBar in a WPF application

Writing a program using WPF (with MahApps) In C# and wondering how can I disable a user being able to right click the TitleBar and brining up the window options menu?
Edit1: to confirm I would like to keep the min/max/close button on the bar, just remove the right click event

There is a new property in MahApps v2.x called ShowSystemMenuOnRightClick.
<mah:MetroWindow x:Class="MetroDemo.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mah="http://metro.mahapps.com/winfx/xaml/controls"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
Title="MahApps.Metro - Demo Application"
Width="900"
Height="600"
mah:DialogParticipation.Register="{Binding}"
GlowBrush="{DynamicResource MahApps.Brushes.Accent}"
ShowIconOnTitleBar="True"
ShowSystemMenuOnRightClick="False"
WindowStartupLocation="CenterScreen"
mc:Ignorable="d">
</mah:MetroWindow>

ReactiveUI - Views not rendering properly (or in full)

I'm in the process of starting a new project, using ReactiveUI and MahApps.Metro. The first hurdle I've hit is a problem of views not showing in their entirety. I have a Window, and in that Window I have a ViewModelViewHost from the RxUI library. It is a simple container for a nested view-model. The ActiveItem binding is properly binded to the view-model of the User Control, and the Button from the user control is visible on screen.
What I expect to see is a Window with a dark gray background and a button in the middle. What I see is the Window with its default background and a Button in the middle. This is not right. If I remove the button, I see nothing on the Window, only the default background.
It seems the ViewModelViewHost is only showing the actual contents of a UserControl and is disregarding what isn't considered a real Control, such as grids etc.
Has anyone come across this behaviour before?
<mah:MetroWindow x:Class="...MainWindow"
xmlns:mah="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:rx="clr-namespace:ReactiveUI;assembly=ReactiveUI"
WindowStartupLocation="CenterScreen"
ShowTitleBar="False"
ShowCloseButton="False"
ShowMaxRestoreButton="False"
ShowMinButton="False"
Height="768"
Width="1024">
<Grid HorizontalAlignment="Center" VerticalAlignment="Center">
<rx:ViewModelViewHost ViewModel="{Binding ActiveItem}" />
</Grid>
</mah:MetroWindow>
<UserControl x:Class="...NestedView"
Name="TheUserControl"
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"
mc:Ignorable="d"
TextOptions.TextHintingMode="Auto"
TextOptions.TextRenderingMode="Auto"
d:DesignHeight="768" d:DesignWidth="1024">
<Grid Background="DarkGray">
<Button Width="200" Height="100" />
</Grid>
</UserControl>

This won't be a ReactiveUI problem, just a simple WPF one.
The ViewModelViewHost is centered in your window. While your UserControl has a DesignHeight and DesignWidth set, when it's rendered at runtime it will automatically size itself to the height and width of its content - the Button.
Add VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch" to your ViewModelViewHost declaration and remove the other two Alignment attributes (they default to Stretch) and it should stretch its contents to the size of the Window while centering any item that has a fixed size.

WPF - Setting window size to child usercontrol size

I have a tab control that is dynamically populated with tabs that contain user controls of various sizes. When a tab is opened I want the window to automatically resize to a size that makes sense given the active user control. Is there a clean way to do this?
I'm using a standard mvvm pattern.

Use the SizeToContent property on the Window class.
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow"
SizeToContent='Width'>
<Grid>
<Button Width='200' Content='The Button' />
</Grid>
</Window>

wpf webbrowser on transparent window

I have a WPF WebBrowser control in a Window.
I want to remove the default window controls so I set AllowsTransparency="True" and WindowStyle="None".
<Window x:Class="InstallerToolkit.InteractiveDemosWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Height="870" Width="1110" WindowStyle="None" AllowsTransparency="True" WindowStartupLocation="CenterScreen">
<Grid>
<WebBrowser Name="WebBrowser" HorizontalAlignment="Left" Height="795" Margin="10,35,0,0" VerticalAlignment="Top" Width="1082" />
</Grid>
This results in me not being able to see my webbrowser contents. If I remove the AllowsTransparency="True" then I can see by webpage but I now have the default controls which I dont want.
How do I get around this?

If the functionality you are looking for is truly AllowTransparency, you can update to WPF 4.5 where they have added a fix to Airspace issues, read this for more details.
If you are unable to upgrade your version of WPF then you will need to disable resize as others have mentioned.

Adding ResizeMode = NoResize should get you rid of the controls. I should mention that AllowTransparency = True can reduce performance! Depending on the kind of software, try avoinding it!

wpf borderless window focus not firing

I have the following WPF window definition but the focus/lost focus events are not firing when I click away from the application, any ideas?
<Window x:Class="BevaClient.windowMain"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:l="clr-namespace:BevaClient"
xmlns:forms="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"
Title="VPN Tool" Height="500" Width="370"
Focusable="True"
WindowStyle="None"
ResizeMode="NoResize"
Topmost="True"
Style="{StaticResource defaultWindow}"
Loaded="Window_Loaded"
GotFocus="Window_GotFocus"
LostFocus="Window_LostFocus">
I have tried setting topmost to false to see if this was the issue but it makes no difference.
Any advice on this issue would be very much appreciated.
Thanks,
David

Hook to Activated and Deactivated events instead.