is there mouse hold left click function?

[left]

hello, i hope this in the right place.

i want to create an interface similar to that of Lucas arts game "Full throttle". In which if you left click on anything you walk to that spot but if you hold lift click down over an object it comes up with
a GUI with the options for that object e.g. use, look etc. I have figured out how to hae the GUI come up at the mouse co-ordinates but i can't figure out the rest.

thanks in advance 

[Ishmael]

For first aid:

if (IsButtonDown(LEFT) == 1) {

[Radiant]

In execute_always, put something like this:

Code: ags

/// put 'int holddown = 0;' at the top of your global script file
if (IsButtonDown (LEFT) && IsGUIOn (THINGY) == 0) {
   holddown ++;
   if (holddown >= 40) {
        holddown = 0;
       GUIOn (THINGY);
        // set GUI position to mouse pos
    }
}