CLS File Extension - Open .CLS files

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Common File Extensions

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.CLS File Extension

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File Type

Program Class File

Category

Developer Files

Common?

File Description

Contains "objects" referenced by the source code of one or more programs in a software programming project; may define functions, variables, or various data types.

Saved within a Visual Basic Project (.VBP file), but often saved as a separate file during program development; compiled into the program during the software compilation process.

Program(s) that open cls files

Windows

Microsoft Visual Basic or Visual Studio .NET