A script for enabling/disabling mouse input in GameMaker.

mouse_click_enabled.gml

gml_pragma("global", @'
        global.mouse_clicks = true;');
/// @desc Disables/enables mouse clicks.
/// @param enable {Bool} Whether to enable mouse clicks.
/// @author Kat @katsaii
var enable = bool(argument0);
if (enable ^^ global.mouse_clicks) then global.mouse_clicks = enable;

mouse_click_is_enabled.gml

/// @desc Returns whether mouse clicks are enabled.
/// @author Kat @katsaii
return global.mouse_clicks;

scr_mouse_click.gml

#macro mouse_check_button scr_mouse_click
/// @desc Checks for a mouse click.
/// @param button {Integer} The id of the mouse button to check.
/// @author Kat @katsaii
return global.mouse_clicks && device_mouse_check_button(0, argument0);

scr_mouse_click_pressed.gml

#macro mouse_check_button_pressed scr_mouse_click_pressed
/// @desc Checks for a mouse click.
/// @param button {Integer} The id of the mouse button to check.
/// @author Kat @katsaii
return global.mouse_clicks && device_mouse_check_button_pressed(0, argument0);

scr_mouse_click_released.gml

#macro mouse_check_button_released scr_mouse_click_released
/// @desc Checks for a mouse click.
/// @param button {Integer} The id of the mouse button to check.
/// @author Kat @katsaii
return global.mouse_clicks && device_mouse_check_button_released(0, argument0);