与用户交互的接口返回枚举值.
[uuid(C88886F0-30B1-46CC-9687-7A586E824AE6), helpstring("McUiPrStatus")] enum McUiPrStatus { mcCancel = 0, mcOk = 1, mcNone = 2, mcKeyWord = 3 };
MxDrawEnum.idl
结构体和枚举