Application Object
Application 对象是Grapher Automation的顶级对象，包括其他对象。
The Application object represents the Grapher program. It is a single instance of Grapher and it is the root of all objects in Grapher. External programs typically create an instance of the Application object during initialization**. In VB this is done using the CreateObject function as in:**
Set GrapherApp = CreateObject(“Grapher.Application”)
The CreateObject function activates a new instance of Grapher, and returns a reference to the Application object to the script.
When Grapher is started by a script, its main window is initially hidden. To make the Grapher window visible, you must set the Application object’s Visible property to True:
当grapher由脚本启动时，其主窗口最初是隐藏的。若要使图示器窗口可见，必须将应用程序对象的Visible属性设置为true:
Set Graph