DLL's

While the purpose of this suite of DLL's is to provide the Windows
application developer an easy means to print and display bar codes from
within their own programs the utility DMBCDLL Assistant has been provided
in order to allow the user to exercise and explore the bar code functions
Dmbcdll1 and Dmbcdll2 located in the dynamic link libraries dmdll1_16.dll
& dmdll2_16.dll.

Typical sort times:
500k 2 secs, 1mb 6 secs, 10mb 112 secs, 50mb 11min 25 secs.

Sorts up to 143m records (to be raised)

Supplied with:
1) VB4 16 bit testbed and code for testbed.
2) Delphi .DPR snippet for invoking DiskSort.DLL

Features:
- Status message with progress line.
- User terminate with advice to caller.
- Extensive "sanity checking".

Method:
Recursive subdivision of file to bottom level, then Shell Sort blocks
followed by iterative merging of two buffers back to top level.

Principle:
1) Establish sort times regardless of free memory (max 180kb work buffer).
2) Use of Shell Sort rather than Quick Sort to avoid stack use.
3) Minimize disk head seek activity.