Hello,

HorizontalAlignment is not working too on my end. However, I will try to discuss with the developer team on how to set the custom control's alignment to the right.

Meanwhile, you can put the local custom control inside UXWindow and set the Margin property from UXWindow control such as following: 

<Intersoft:UXDesktop x:Name="uxDesktop" Background="{x:Null}" TaskBar="{Binding ElementName=desktopDock}">
   <Intersoft:UXWindow x:Name="wndHome" Margin="600, 0" IsClientVisible="True"  IsActive="True">
      <local:Welcome/>
   </Intersoft:UXWindow>
</Intersoft:UXDesktop>

Hope this helps.

Thank you.

Hello,

As mentioned in our ClientUI Docs under section Positioning a Window at Startup (http://www.intersoftpt.com/Support/ClientUI/Docs/WindowOverview.html), UXWindow has 3 values to position a window, which are Auto, CenterScreen and CenterOwner.

If you want to manually position a window, you need to set the WindowStartupLocation to Auto, and then set Left and Top properties. Here is the following code:

<Intersoft:UXDesktop x:Name="uxDesktop" Background="{x:Null}" TaskBar="{Binding ElementName=desktopDock, Mode=OneWay}">
   <Intersoft:UXWindow x:Name="wndHome" IsClientVisible="True" IsActive="True" WindowStartupLocation="Auto" Top="0" Left="800">
      <local:Welcome/>
   </Intersoft:UXWindow>

</Intersoft:UXDesktop>

Hope this helps.

Thank you.