void listView1_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                ListViewItem item = listView1.GetItemAt(e.X,e.Y);
                item.Selected = true;
            }
        }

        Point pos = new Point();
        void pictureBox1_MouseUp(object sender, MouseEventArgs e)
        {
            pos.X = e.X;
            pos.Y = e.Y;
        }
       
        void pictureBox1_DragDrop(object sender, DragEventArgs e)
        {
            string[] str = e.Data.GetFormats();
            if (str.Length == 0)
                return;
            Label lab = e.Data.GetData(str[0]) as Label;
            lab.BackColor = Color.Gray;
            pictureBox1.Controls.Add(lab);
            lab.Location = pos;
        }

        void pictureBox1_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(typeof(Label)))
                e.Effect = DragDropEffects.Copy;
            else
                e.Effect = DragDropEffects.None;

        }

------解决方案--------------------
原则上说用点击就可以实现了

如果要用拖的话就得用API去捕捉了,没必要费这功夫啊

------解决方案--------------------
7楼的已经说得很清楚了

------解决方案--------------------
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