context identifier

基本解释

Call this member function to retrieve the help context identifier, if any, associated with the window.
調用這個函數以獲得與窗口相關的幫助上下文標識符，如果有的話。
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If a child window does not have a help context identifier, it inherits the identifier of its parent window.
調用這個成員函數以將幫助上下文標識符與指定的窗口相關聯。
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Retrieves the library's documentation string, the complete Help file name and path, and the context identifier for the library Help topic in the Help file.
擷取程式庫的文件字串、完整的說明档名稱和路逕，以及說明档中程式庫說明主題的主題代碼。