//双击任意picturebox时，开启timer  
private void pbxiana_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            trMove.Enabled = true;
            trMove.Interval = 1;
            //PictureBox loli = sender as PictureBox(这句应该对，就是这边的loli在下面的函数中不能)
        ｝
   private void timer1_Tick(object sender, EventArgs e)
        {
            PictureBox loli = sender as PictureBox;//貌似这句有错，不知道sender是哪个参数
            if (loli.Location.X > 75)
            {
                loli.Left -= 10;

            }
            if (loli.Location.Y < 490)
                loli.Top += 10;  
       ｝
求指点，求调教

LS只能实现指定的一个图片的移动，我想实现多个，但不想重复写

额，系统提示我loli没赋值，一直为null，貌似失败了

额，原来loli前面那句picturebox没去掉--，谢谢各位了