calling procedure from GUI using TIMER

And for timer, the quickest is probably to use CPeriodic, along these lines;

//construct
iTimer = CPeriodic::NewL(CActive::EPriorityStandard);

[...]
//a callback for timer event
LOCAL_C TInt Callback(TAny* aArg)
{
   CMyView* view = (CMyView*)aArg;
   view->HandleCommandL(...);
   return 0;
}
[...]
//to start it from a function within the view:
  iTimer->Start(KDelayToStart, KInterval, TCallBack(Callback,this));

//to stop:
 iTimer->Cancel();