本文介绍了一个用于标记文档是否被修改的函数voidSetModifiedFlag。通过调用此函数并设置参数bModified为TRUE或FALSE，可以指示文档的状态。默认情况下，参数bModified设为TRUE，表明文档已更改。
void SetModifiedFlag( BOOL bModified = TRUE );
Parameters
bModified
Flag indicating whether the document has been modified.
Remarks
Call this function after you have made any modifications to the document. By calling this function consistently, you ensure that the framework prompts the user to save changes before closing a document. Typically you should use the default value of TRUE for the bModified parameter. To mark a document as clean (unmodified), call this function with a value of FALSE.
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