Returns whether a given mouse button is held down. If no button is specified, returns 1 if any mouse button is held down.
See also Utility functions.
Signature:
isDown = IsMouseButtonDown([button])
Arguments:
button- Number or name of a mouse button (number,string)1 or LeftButton- Primary mouse button2 or RightButton- Secondary mouse button3 or MiddleButton- Third mouse button (or clickable scroll control)4 or Button4- Fourth mouse button5 or Button5- Fifth mouse button
Returns:
isDown- 1 if the mouse button is down; otherwise nil (1nil)