DataEnvironment._AddProperty 方法

 VIRTUAL METHOD _AddProperty(
	cPropertyName AS STRING,
	uValue AS USUAL,
	nVisibility AS LONG,
	 cDescription AS STRING
) AS LOGIC

public virtual bool _AddProperty(
	string cPropertyName,
	__Usual uValue,
	int nVisibility,
	[DefaultParameterValueAttribute("", 0)] string cDescription
)