---@diagnostic disable: missing-return, lowercase-global
---@meta

---@alias mouseButton
---| 1 or "LeftButton" - Primary mouse button
---| 2 or "RightButton" - Secondary mouse button
---| 3 or "MiddleButton" - Third mouse button (or clickable scroll control)
---| 4 or "Button4" - Fourth mouse button
---| 5 or "Button5" - Fifth mouse button

---@param button mouseButton
---@return boolean isDown
---Returns whether a given mouse button is held down. If no button is specified, returns 1 if any mouse button is held down.
function IsMouseButtonDown(button) end