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ExtractFileDir£º·µ»ØÍêÕûÎļþÃûÖеÄ·¾¶£¬×îºó²»´ø“/” ,Èç"C:\test"
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function ExtractRelativePath(const BaseName, DestName: string): string;
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SysUtils.ExtractRelativePath('C:\test','C:\Test\TestRelativePath'):·µ»ØTestRelativePath
SysUtils.ExtractRelativePath('C:\Test\TestRelativePath','C:\test'):·µ»Ø'..\TestRelativePath'
SysUtils.ExtractRelativePath('C:\Test\TestRelativePath\','C:\test'):·µ»Ø'..\..\TestRelativePath'
ExtractShortPathName :·µ»Ø¶ÌÎļþÃû£¬¼´8+3£¬ÎļþÃû³¤°Ë룬À©Õ¹ÃûΪ3ºÅ£¬Îª±£³ÖDOSϵͳ¼æÈݶø´æÔÚ
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ExtractFileName() ´ÓÎļþÃûÖгéÈ¡²»º¬Â·¾¶µÄÎļþÃû
ExtractFilePath() ´ÓÎļþÃûÖгéȡ·¾¶Ãû
ExtractFileDir() ´ÓÎļþÃûÖгéȡĿ¼Ãû
ExtractFileDrive() ´ÓÎļþÃûÖгéÈ¡Çý¶¯Æ÷Ãû
ChangeFileExt() ¸Ä±äÎļþµÄÀ©Õ¹Ãû
ExpandUNCFileName() ·µ»Øº¬ÓÐÍøÂçÇý¶¯Æ÷µÄÎļþȫ·¾¶
ExtractRelativePath() ´ÓÎļþÃûÖгéÈ¡Ïà¶Ô·¾¶ÐÅÏ¢
ExtractShortPathName() °ÑÎļþÃûת»¯ÎªDOSµÄ8·3¸ñʽ
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ExtractFilePath(FileName:String)
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ExtractFileDir(FileName:String)
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