<ControlTemplate x:Key="LabelTemplate" TargetType="{x:Type Label}">
    <Border Background="{TemplateBinding Background}" UseLayoutRounding="True">
        <ContentPresenter
	    Margin="{TemplateBinding Padding}"
            HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
            VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
            UseLayoutRounding="{TemplateBinding UseLayoutRounding}"
            RecognizesAccessKey="True"/>
    </Border>
</ControlTemplate>

<Label Template="{StaticResource LabelTemplate}" Content="This is a label" Background="Red"/>

// assuming your script attached to these mouse events
private _dragging = false;
void OnMouseDown(BaseComponent sender, MouseButtonEventArgs args)
{
    UIElement element = sender.As<UIElement>();
    element.CaptureMouse();
    this._dragging = true;
}
void OnMouseUp(BaseComponent sender, MouseButtonEventArgs args)
{
    UIElement element = sender.As<UIElement>();
    element.ReleaseMouseCapture();
    this._dragging = false;
}
void OnMouseMove(BaseComponent sender, MouseEventArgs args)
{
    if (this._dragging)
    {
        // dragging code
    }
}

using UnityEngine;
using System;
using System.Runtime.InteropServices;
using Noesis;

namespace CustomControls
{
public class NumericUpDown : UserControl
{
    private HandleRef swigCPtr;

    public static DependencyProperty ValueProperty;

    // This function is required (even if empty) to register the class in NoesisGUI
    // automatically, so objects of this type can be created when XAML is parsed
    public static void Register()
    {
        // Register the dependency properties
        ValueProperty = DependencyProperty.Register("Value", typeof(int),
            typeof(NumericUpDown), new PropertyMetadata((int)0));

        // Here you indicate the xaml file where this UserControl defines its
        // contents
        UserControl.SourceProperty.OverrideMetadata(typeof(NumericUpDown),
            new PropertyMetadata("Assets/CustomControls/NumericUpDown.xaml"));
    }

    public int Value
    {
        get { return GetValue<int>(ValueProperty); }
        set { SetValue<int>(ValueProperty, value); }
    }

    public NumericUpDown(IntPtr cPtr, bool cMemoryOwn)
        : base(cPtr, cMemoryOwn)
    {
        swigCPtr = new HandleRef(this, cPtr);
    }

    public NumericUpDown()
        : this(Noesis.Extend.New(typeof(NumericUpDown)), true)
    {
        Noesis.Extend.Register(typeof(NumericUpDown), swigCPtr.Handle, this);
    }

    public override void Dispose()
    {
        lock (this)
        {
            if (swigCPtr.Handle != IntPtr.Zero)
            {
                if (swigCMemOwn)
                {
                    swigCMemOwn = false;
                    if (Noesis.Kernel.IsInitialized())
                    {
                        Noesis.Extend.Delete(typeof(NumericUpDown), swigCPtr.Handle);
                    }
                }
                swigCPtr = new HandleRef(null, IntPtr.Zero);
            }
            GC.SuppressFinalize(this);
            base.Dispose();
        }
    }

    // Initialize the user control here
    public void OnPostInit()
    {
        RepeatButton upButton = FindName<RepeatButton>("UpButton");
        upButton.Click += OnUpButtonClick;
        RepeatButton downButton = FindName<RepeatButton>("DownButton");
        downButton.Click += OnDownButtonClick;
    }

    void OnUpButtonClick(BaseComponent sender, RoutedEventArgs e)
    {
        Value = Value + 1;
    }

    void OnDownButtonClick(BaseComponent sender, RoutedEventArgs e)
    {
        Value = Value - 1;
    }
}

<UserControl
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  x:Class="CustomControls.NumericUpDown"
  x:Name="NumericUpDownControl"
  UseLayoutRounding="True">

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
            <ColumnDefinition Width="Auto"/>
        </Grid.ColumnDefinitions>

        <Border Grid.RowSpan="2" Grid.ColumnSpan="2" BorderThickness="1"
          BorderBrush="Gray"/>

        <TextBlock Grid.RowSpan="2" VerticalAlignment="Center" Margin="5,3,4,3"
          Text="{Binding Value, ElementName=NumericUpDownControl}"/>

        <RepeatButton Name="UpButton" Grid.Column="1" Grid.Row="0" Padding="4,1"
          Margin="0,2,2,0">
            <Path Data="M1,1L4,4 7,1" Stroke="Black" StrokeThickness="2"
              StrokeStartLineCap="Round" StrokeEndLineCap="Round"
              RenderTransformOrigin="0.5,0.5">
                <Path.RenderTransform>
                    <ScaleTransform ScaleY="-1"/>
                </Path.RenderTransform>
            </Path>
        </RepeatButton>

        <RepeatButton Name="DownButton" Grid.Column="1" Grid.Row="1" Padding="4,1"
          Margin="0,0,2,2">
            <Path Data="M1,1L4,4 7,1" Stroke="Black" StrokeThickness="2"
              StrokeStartLineCap="Round" StrokeEndLineCap="Round"/>
        </RepeatButton>

    </Grid>

</UserControl>

<Grid
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:local="clr-namespace:CustomControls">

    <StackPanel Width="100" VerticalAlignment="Center">
        <local:NumericUpDown Margin="5"/>
        <local:NumericUpDown Margin="5"/>
        <local:NumericUpDown Margin="5"/>
    </StackPanel>

</Grid>

    // ...
    public static void Register()
    {
        // Register the dependency properties
        ValueProperty = DependencyProperty.Register("Value", typeof(int),
            typeof(NumericUpDown), new PropertyMetadata((int)0));

        // Here you indicate the xaml file where this UserControl defines its
        // contents
        UserControl.SourceProperty.OverrideMetadata(typeof(NumericUpDown),
            new PropertyMetadata("Assets/GUI/CustomControls/NumericUpDown.xaml"));
    }
    // ...