Version 4.0 Notes

Version 4.0 is the first new update to the program in years.  It is a full-functioning Windows program native to 64-bit operating systems.


Version 4.0 represents a major overhaul to the program, which was originally written in Fortran. The new version is written in Free Pascal using the Lazarus Integrated Development Environment.


In addition to updating the code, the help files were converted from the old Windows help format to the Windows HTML help format.


Version 4.0 was developed just as GHCN2 was ending its operational life. GHCN3 has now supplanted GHCN2. ClimExWin will be eventually be updated to search GHCN3 data.

Copyright 1995-2011, David M. Lawrence

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