自己看帮助去那不是写着那吗Unit Sysutils Extracts the drive and directory parts from FileName. UnitSysutilsCategoryfile name utilitiesfunction ExtractFileDir(const FileName: string): string;DescriptionThe resulting string is a directory name suitable for passing to the CreateDir, GetCurrentDir, RemoveDir, and SetCurrentDir functions. This string is empty if FileName contains no drive and directory parts.Note: This function works for multi-byte character systems (MBCS).
Extracts the drive and directory parts from FileName. UnitSysutilsCategoryfile name utilitiesfunction ExtractFileDir(const FileName: string): string;DescriptionThe resulting string is a directory name suitable for passing to the CreateDir, GetCurrentDir, RemoveDir, and SetCurrentDir functions. This string is empty if FileName contains no drive and directory parts.Note: This function works for multi-byte character systems (MBCS).