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The table below provides some useful information about the .def extension. It answers questions such as:

  • What is the .def file?
  • What program do I need to open a .def file?
  • Where can I find the specifications for .def?
  • How can I convert .def file to another format?

We hope you find this page helpful and a valuable resource.

Details of extension .def

Recommended: Click here to run a free instant scan for .def related errors

1 extension(s) and 0 alias(es) found in database.

Extension: .def
Type: C++ Definition File
Category: Development
Mime type: text/plain
Description:
DEF file is a C++ Definition File. C++ is a general-purpose programming language. It is a statically-typed free-form multi-paradigm language supporting procedural programming, data abstraction, object-oriented programming, and generic programming.
[Detailed description] [Sample not yet available]
Open with: Visual C++
Program name: none
Related links:
none
Aliases:
none
Related extensions:
ac, am, aps, asm, bb, bbg, c, c++, cco, chi, chs, clw, cs, dbgdt, dlg, dsp, dsw, ewd, ewp, eww, f, h, hpp, hs, htl, i, i, idl, mk, obj, opt, pas, pds, pp, ppl, ppu, rc, rct, t, vip, xcl

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Cannot open .def files on your system?

Open with...

When windows gives you an error message saying that it cannot open .def files, this means either:

  1. You need to identify a program that can open the file or
  2. Your registry may be damaged.

RECOMMENDED:
In both cases it is strongly recommended that you run a free scan for registry errors.

Maximize system performance
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