R_Compress()    Compresses a file using the Lempel-Ziv algorithm
 R_CPName()      Determines the original name of a compressed file
 R_CPSize()      Determines the original size of a compressed file
 R_DeComp()      Decompresses a by R_Compress() compressed file
 R_FSize()       Determines the size of a file
 R_IsRCmp()      Determines if a file has been compressed by R_Compress()
 R_LastErr()     Retrieves the last occurred error code (v2.0)