.IDL File Extension

Interface Definition Language File

Developer Microsoft
Popularity
3.6  |  5 Votes
 

What is an IDL file?

Source code file created using the Microsoft Interface Definition Language (MIDL); contains interface and type library definitions; used for defining interfaces between client and server applications; also used for generating type libraries (.TLB files) for OLE automation.

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Programs that open or reference IDL files

Windows
Microsoft Visual Studio 2022
Free+
Microsoft Platform SDK

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