CTPManagerShareTEnterBackStage 方法
Use this to keep _isActive value of workbook's CTP unchanged when entering backstage.
命名空间： Excel880VSTO程序集： Excel880VSTO (在 Excel880VSTO.dll 中) 版本：1.5.8.0 (1.5.8.0)
public void EnterBackStage()
Public Sub EnterBackStage
Dim instance As CTPManagerShare
instance.EnterBackStage()
Cf. use of _isInBackStage in CTP_VisibleStateChange.