GridBrushBase 类具有可进行覆盖以便处理 Z 位置变化的方法。因此可以设置自定义可编程笔刷的自定义行为。这些方法是：
public virtual void ChangeZPosition(int change):
Changes the Z Position of the Brush. The change argument is the amount that is changed by using the Hotkeys or the Z Position Inspector.
public virtual void ResetZPosition():
Resets the Z Position of the Brush. You define what value to reset the Z Position to.