Here are the data structures with brief descriptions:

Cmscab_compressor	TODO
Cmscab_decompressor	A decompressor for .CAB (Microsoft Cabinet) files
Cmscabd_cabinet	A structure which represents a single cabinet file
Cmscabd_file	A structure which represents a single file in a cabinet or cabinet set
Cmscabd_folder	A structure which represents a single folder in a cabinet or cabinet set
Cmschm_compressor	A compressor for .CHM (Microsoft HTMLHelp) files
Cmschm_decompressor	A decompressor for .CHM (Microsoft HTMLHelp) files
Cmschmc_file	A structure which represents a file to be placed in a CHM helpfile
Cmschmd_file	A structure which represents a file stored in a CHM helpfile
Cmschmd_header	A structure which represents a CHM helpfile
Cmschmd_sec_mscompressed	A structure which represents the LZX compressed section of a CHM helpfile
Cmschmd_sec_uncompressed	A structure which represents the uncompressed section of a CHM helpfile
Cmschmd_section	A structure which represents a section of a CHM helpfile
Cmshlp_compressor	TODO
Cmshlp_decompressor	TODO
Cmskwaj_compressor	A compressor for the KWAJ file format
Cmskwaj_decompressor	A decompressor for KWAJ compressed files
Cmskwajd_header	A structure which represents an KWAJ compressed file
Cmslit_compressor	TODO
Cmslit_decompressor	TODO
Cmsoab_compressor	A compressor for the Offline Address Book (OAB) format
Cmsoab_decompressor	A decompressor for .LZX (Offline Address Book) files
Cmspack_file	A structure which represents an open file handle
Cmspack_system	A structure which abstracts file I/O and memory management
Cmsszdd_compressor	A compressor for the SZDD file format
Cmsszdd_decompressor	A decompressor for SZDD compressed files
Cmsszddd_header	A structure which represents an SZDD compressed file