.def

File Type 1 Module-Definition File IconModule-Definition File
Rank ★ ★ ☆  Average
Description

Lists the exports and attributes of a program to be linked by an application linker; used in software development when creating a DLL.

DEF files are used by Microsoft Visual C++, a component of Microsoft Visual Studio, as well as other C++ development software.

Open With
Windows

IconMicrosoft Visual Studio

Updated 2007
File Type 2 Generic IconSmartWare II Data File
File Format Proprietary (SmartWare)
Usage Open manually
Rank ★ ☆ ☆  Uncommon
Description

Spreadsheet and database format used by SmartWare II database software.

Open With
Windows

IconSmartWare

Updated 2007
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