这是一个简化的CSeekButton控件，它是一个简单的按钮，当按下时可以增加或减少一个值。方向（正向或负向），初始值，步长，最小和最大值都可以配置。- This simplification CSeekButton controls, it is a simple
button, when presses down may increase or reduce a value. The
direction (to or negative direction), the starting value, the length
of stride, is smallest and the maximum value all may dispose.