HookButton

void HookButton(int button, string function)

Each time the key, set by the standard button numbers, is pressed the function is called. Note this is once and only per button press, it is not called repeatedly if the button is held. It needs to be released then pressed again to trigger another function call. As with all hook functions, it requires the string of a function name that requires no passed values, and any return value is ignored. To remove the hook, call pass "" as the function name. The button numbers to pass are similar to those passed to Unpress, with some limitations:

Numerical Value	Button Hooked
0	All buttons (no effect)
1	b1
2	b2
3	b3
4	b4
5	up (no effect)
6	down (no effect)
7	left (no effect)
8	right (no effect)

// Put this in system.vc and it will actually compile and run...
void autoexec()
{
	// Hooks the up key to the function
	HookButton(1, "ButtonDown_Enter");
	while (!b3) { UpdateControls(); }
	exit("And you said you would change...");
}

void ButtonDown_Enter() // If up arrow is pressed
{
	// Display a little message box
	MessageBox("One enter button pressed");
}