expecting unit information can be specified either as an integer or long integer expression without a unit, or as a character string containing a unit. If no unit is passed to the method the default unit defined for the active document type will be used. If the parameter is passed as a character string containing a measurement unit, the default setting will be ignored. The default measurement unit for a document type can be set under
指定为不带单位的整数或长整数表达式，也可指定为带有单位的字符串。如果未向方法传送任何单位，则使用活动文档类型定义的默认单位。如果传送的参数是带有度量单位的字符串，将忽略默认设置。在