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Custom Tools

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This article applies to Visual Studio 2015. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here

Custom tools let you associate a tool with an item in a project and run that tool whenever the file is saved. Certain custom tools, sometimes referred to as single-file generators, are frequently used to implement translators that generate code from data and vice versa. For example, single-file generators create Visual C# and Visual Basic source code out of the .settings and .resx files. The generated source code provides strongly-typed access to the data in the .settings and .resx files. The Visual C# and Visual Basic project types support custom tools; Visual C++ project types do not. Your own project types can also support custom tools.

Custom tools are registered components that implement the IVsSingleFileGenerator interface.

Custom tools are associated with a ProjectItem interface object, and are like designers and editors. A custom tool takes the file represented by a ProjectItem as input and writes a new file whose file name is provided by the DefaultExtension method.

In This Section

Implementing Single-File Generators
Describes how to use the IVsSingleFileGenerator interface to implement a custom tool.

Determining the Default Namespace of a Project
Describes how to determine the correct namespace based on the language being used.

Registering Single File Generators
Provides descriptions for all the registry entries for a custom tool.

Exposing Types to Visual Designers
Explains how project systems provide support for visual designers to access generated classes and types through temporary portable executable (PE) files.

Persisting the Property of a Project Item
Shows how to persist a project item property, such as the author of a source file, in the project file.

Reference

IVsSingleFileGenerator
Provides details about the IVsSingleFileGenerator, which transforms a single input file into a single output file that can be compiled or added to a project.

ProjectItem
Explains the ProjectItem interface, which represents an item in a project.

DefaultExtension
Provides details about the DefaultExtension method, which retrieves the file name extension that is given to the output file name.

Extending Projects
Describes how to use Visual Studio projects and solutions to organize code files and resource files, and how to implement source control.