小球是图片吗,
给他的location值改下啊.
获得下键盘上下的键位来移动啊

hoho~只是想法而已.
应该能实现的吧.

方向键有"上下左右",
按上键"X坐标不变,Y坐标增加(自己设定增量)",
按下键"X坐标不变,Y坐标减小(自己设定增量)",
按左键"Y坐标不变,X坐标减小(自己设定增量)",
按右键"Y坐标不变,Y坐标增加(自己设定增量)"

//定义个常量步长为L,我赋值是2(你可以随便赋值)
        const int L = 2;        
        //Form里面的一个事件KeyDown,在Form里面用了个lable(里面随便写几个字)我取名叫lblQ
        private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Up)
            {
                this.lblQ.Location = new Point(this.lblQ.Location.X, this.lblQ.Location.Y - L);
            }
            if (e.KeyCode == Keys.Down)
            {
                this.lblQ.Location = new Point(this.lblQ.Location.X, this.lblQ.Location.Y + L);
            }
            if (e.KeyCode == Keys.Left)
            {
                this.lblQ.Location = new Point(this.lblQ.Location.X - L, this.lblQ.Location.Y);
            }
            if (e.KeyCode == Keys.Right)
            {
                this.lblQ.Location = new Point(this.lblQ.Location.X + L, this.lblQ.Location.Y);
            }
        }
还是帮你写下吧!呵呵!我调试过了可以的!

楼上是正解.并且.一定要在OnKeyDown中实现而不能使用OnKeyUp.

[[it] 本帖最后由 itwalker 于 2008-7-22 13:43 编辑 [/it]]