Description

This function will return true if the mouse button being checked is held down or false if it is not. You supply the mouse button to check from one of the following constants:

Constant	Description
mb_left	The left mouse button
mb_middle	The middle mouse button (this may not be valid for all target platforms)
mb_right	The right mouse button
mb_none	No mouse button
mb_any	Any of the mouse buttons

Syntax:

mouse_check_button(numb);

Argument	Description
numb	Which mouse button constant to check for.

Returns:

Boolean

Example:

if mouse_check_button(mb_left)
   {
   instance_create_layer(mouse_x, mouse_y, "Effects", obj_Star);
   }

The above code will check for the left mouse button and every step that it is held down will create an instance of the object indexed in "obj_Star".