UInputMan:MouseButtonHeld

From Data Realms Wiki

Function
Syntax	UInputMouseButtonHeld( Number )
Description:
Returns whether or not a mouse button is held down.
Returns	Boolean

Example
Description	Prints 1 if left mouse button is held, 0 if not.
Code	if UInputMan:MouseButtonHeld(0) then print(1) else print(0) end  --0 is left button, 1 is right, and 2 is middle.
Output	Prints 1 or 0 to console.