尝试使用CompositionTarget.Rendering在WPF中学习动画

Question

我试图弄清楚如何使用VB.NET动画/移动WPF中的元素。有人建议我尝试使用CompositionTarget.Rendering，但我很难开始。下面是我的代码，下面是我得到的错误消息。有人可以告诉我哪里出错了。

代码：

Imports System.ComponentModel

Class MainWindow

    Dim flake0 As New flake

    Private Sub Window_Loaded(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles MyBase.Loaded
        canvas1.DataContext = flake0
        AddHandler CompositionTarget.Rendering, AddressOf compo
    End Sub

    Private Sub compo(ByVal sender As Object, ByVal e As EventArgs)
        flake0.move()
    End Sub
End Class

错误：

Handles clause requires a WithEvents variable defined in the containing type or one of its base types

Answer 1

我有另一种方法，意外地将“处理CompositionTarget.Rendering”标记到其末尾。