我用的是

 private bool isMouseMove = false;//获取鼠标是否游动
        private Point mouseOffset; //记录鼠标指针的坐标


 protected void temp_MouseDown(object sender, MouseEventArgs e)
        {
            //当鼠标点击左键 执行对应操作
            if (e.Button == MouseButtons.Left)
            {
               isMouseMove = false;
            }

protected void temp_MouseMove(object sender, MouseEventArgs e)
        {
            //Bitmap img = new Bitmap(temp.Image);
            //temp.DrawToBitmap(img, temp.Bounds);

            if (isMouseMove == false)
            {
                mouseOffset.X = e.X;
                mouseOffset.Y = e.Y;
                isMouseMove = true;
                return;
            }
            if (isMouseMove == true)
            {
                int left = temp.Left + e.X - mouseOffset.X;
                int top = temp.Top + e.Y - mouseOffset.Y;
                temp.Location = new Point(left, top);
            }
        }

来移动一个 picturebox控件 但是 移动的过程总是有重影

我想用API的方式进行移动

[DllImport("user32.dll")]
        public static extern bool ReleaseCapture();
        [DllImport("user32.dll")]
        public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
        private void frmMain_MouseDown(object sender, MouseEventArgs e)
        {
            ReleaseCapture();
            SendMessage(this.Handle, 0x0112, 0xF012, 0);
        }

但是 它是一个 MouseDown 鼠标点击着控件才能移动，我把frmMain_MouseDown 这个方法关联到 mousemove 事件中，但是不起效

所以想请大家帮帮忙