Where to put function declaration used is rules?

[oHaiyang]

Hi, I am new to AHK and bug.n, I searched through the documents and issues but cannot find any instruction tells where to put the function declaration used in rules.

Can anyone help? Thanks a lot.

[joten]

The currently available functions e.g. Window_isPopup can be found in the file src\Windows.ahk, but you may also add custom functions to src\Config.ahk.

If using functions as the third part of a rule, as described in doc/Configuring_rules.md, the function may only have one parameter, the window id.