<- CRPL reference <- Input Commands
| Arguments | Result | Notation | 
|---|---|---|
| Mouse button to check | 0 or 1 depending if mouse button was pressed |   i1 – b1  | 
	
Checks the specified mouse button to see if it is held down. 0 = Left Mouse, 1 = Right Mouse, 2 = Middle Mouise
if (GetMouseButton(0)) # Fire projectile each frame endif