VB.NET FlowLayoutPanel 怎么换位置

VB.NET FlowLayoutPanel 里面添加了2个picturebox ，运行后怎么使picturebox1和picturebox2的位置互换 --------------------编程问答-------------------- 按照相反的顺序添加下

FlowLayoutPanel.Controls.Remove(pictureBox1)
FlowLayoutPanel.Controls.Remove(pictureBox2)
FlowLayoutPanel.Controls.Add(pictureBox2)
FlowLayoutPanel.Controls.Add(pictureBox1)

补充：.NET技术 ,  VB.NET