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copied!<p>SOLVED IT</p> <p>The problem is in the path to the element youre using, its has to derive from the parent class its extending to the property itself. I have it working in my own control so made a small example you can copy paste(UNTESTED CODE):</p> <p><code></p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Media; using Windows.UI.Xaml.Media.Animation; namespace CustomControls { /// <summary> /// Author: Frank Wolferink /// Note: example is untested and comes as is. I hope it save's you the time i lost figering this out /// </summary> public class CustomControl : Control { private Storyboard _compositeTransformExampleStoryBoard; private const string TRANSLATE_X_TARGET = "Control.RenderTransform.CompositeTransform.TranslateX"; private const string TRANSLATE_Y_TARGET = "Control.RenderTransform.CompositeTransform.TranslateY"; private const string TRANSLATE_ROTATE_TARGET = "Control.RenderTransform.CompositeTransform.Rotation"; public CustomControl() { this.RenderTransform = new CompositeTransform(); TimeSpan duration = new TimeSpan(0,0,0,0,500); double translateX = 10; double translateY = 10; double rotation = 40; _compositeTransformExampleStoryBoard = BuildStoryboard(duration, translateX, translateY, rotation); this.Loaded += CustomControl_Loaded; } void CustomControl_Loaded(object sender, RoutedEventArgs e) { _compositeTransformExampleStoryBoard.Begin(); } private Storyboard BuildStoryboard(TimeSpan animationDuration, double transistionValueX, double transistionValueY, double rotation) { Storyboard storyboard = new Storyboard(); if (transistionValueX != 0) CreateAnimation(storyboard, transistionValueX, animationDuration, TRANSLATE_X_TARGET); if (transistionValueY != 0) CreateAnimation(storyboard, transistionValueY, animationDuration, TRANSLATE_Y_TARGET); if (rotation != 0) CreateAnimation(storyboard, rotation, animationDuration, TRANSLATE_ROTATE_TARGET); return storyboard; } private void CreateAnimation(Storyboard storyboard, double transistionValue, TimeSpan animationDuration, string targetProperty) { DoubleAnimation da = CreateDoubleAnimation(transistionValue, animationDuration); storyboard.Children.Add(da); Storyboard.SetTarget(da, this); Storyboard.SetTargetProperty(da, targetProperty); } private DoubleAnimation CreateDoubleAnimation(double transistionValue, TimeSpan duration) { return new DoubleAnimation() { Duration = duration, To = transistionValue }; } } } </code></pre> <p></code></p>

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