The Rainmeter plugin software development kit contains the necessary tools and examples to build plugins in C/C++ and C#. Note that plugins built with the SDK require Rainmeter 2.3 beta or higher.

Download:

• Use git (git clone git@github.com:rainmeter/rainmeter-plugin-sdk.git)
• Use svn (svn checkout https://github.com/rainmeter/rainmeter-plugin-sdk/trunk rainmeter-plugin-sdk)
• Download the current snapshot as a .zip archive.

The SDK can be built using any version of Visual Studio 2019. If you don't already have VS2019, you can download the free "Visual Studio Community" version here.

Documentation: The documentation is available at https://docs.rainmeter.net/developers/.