Check if Link is on a combo

if i wanna check if link is on a combo.

is it like this?

ffc script blah{
     void run(int combo){
         while(true){
            if(Screen->ComboD[ComboAt(Link->X , Link->Y)] == combo){
                  //do stuff
            }//end of if
         Waitframe();
         }end of while
     }end of void run
}//end of script