LabeledInput.xaml

<UserControl x:Class="VRC_OSC_ExternallyTrackedObject.LabeledInput"
             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:local="clr-namespace:VRC_OSC_ExternallyTrackedObject"
             mc:Ignorable="d" 
             DataContext="{Binding RelativeSource={RelativeSource Self}}"
             d:DesignHeight="30" d:DesignWidth="350">
    <Grid Height="30" x:Name="OuterShell">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="150"></ColumnDefinition>
            <ColumnDefinition Width="*"></ColumnDefinition>
        </Grid.ColumnDefinitions>
        <Label Height="28" Content="{Binding LabelText}" HorizontalAlignment="Left"></Label>
        <TextBox Grid.Column="1" Height="20" Text="{Binding InputText}" Margin="0,0,5,0"></TextBox>
    </Grid>
</UserControl>