容器中控件的拖动

        Me.PictureBox2.DoDragDrop(sender, DragDropEffects.Move)

    End Sub

    Private Sub GroupBox1_DragEnter(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles GroupBox1.DragEnter

        e.Effect = DragDropEffects.Move '拖放事件的目标所允许的动作

    End Sub