Added explanation documents.

mac-cpp-source/utils/FileLib.h

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+/*
+ * File Utilities (System 7 and above)
+ *
+ * by Thomas Tempelmann, macdev@tempel.org
+ */
+
+#include <Devices.h>
+
+#pragma push
+#pragma cplusplus on
+
+Boolean FSpIsAlias (FSSpec &spec);
+OSErr FSpResolveAlias (FSSpec &spec);       // L<>st ggf. Aliase auf
+
+DrvQElPtr FindDrvQ (short drv);
+short FindVolByDriveNum (short drvNum);
+
+OSErr GetSysVolume (short *vRefNum);        // gets the boot volume
+
+OSErr FindInFolderByCreator (short vRefNum, long dirID, OSType creator, OSType fileType, FSSpec *foundSpec);
+OSErr FindOnDiskByCreator (short vRefNum, OSType creator, OSType fileType, FSSpec *foundSpec);
+
+OSErr FindOpenFileByTypeAndCreator (OSType type, OSType creator, FSSpec *itsSpec);
+
+#pragma pop
+
+// EOF