Create object from parameters of another from a different timeframe

Hello mql4 experts,

I am trying to put a rectangle on a 5 min chart based on the start and end times of a 15min chart trend line. The code used is shown below. The active chart when the indicator is inserted is the 5min. Based on my understanding that object names are unique, I try to get the time parameters of the 15 min object with the ObjectGet() functions, but this fails. The date and time returned are always Jan 1, 1970 at 0:00:00 (i.e. the metatrader time origin).

I suspect this is because when I use ObjectGet, the 15 min chart is not the active chart. I have researched importing user32.dll GetParent() and SendMessageA() to make the 15min chart active. Apparently, I am not getting it right. Can you put me through please.

int start()
{
datetime myStart, myEnd;
myStart=ObjectGet("Old Trend",OBJPROP_TIME1);
myEnd=ObjectGet("Old Trend",OBJPROP_TIME2);
if(!ObjectCreate("New Trend",OBJ_RECTANGLE,0,myStart,134.00,myEnd,134.05))
{
return(0);
}
else
{
ObjectSet("New Trend",6,Yellow); //6 represents colour property
ObjectSetText("New Trend","New",10,"Arial",Ivory);
}
return(0);