.HDX File Extension

Delphi MultiHelp Index File

Developer Autodesk
Popularity
2.5  |  4 Votes
 

What is an HDX file?

Help documentation file used by older versions of AutoCAD design software; uses the filename ACAD.HDX and supplies an index for an associated ACAD.HLP (.HLP) file; not used by recent versions of AutoCAD.

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Programs that open or reference HDX files

Windows
Autodesk AutoCAD 2023
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