ObjectGetDouble Check return value

[Demosfen]

Hi everyone,

how can I properly check if the following code returns correct price value

ObjectGetDouble(ChartID(),"Line",OBJPROP_PRICE,0);

other than checking if it is bigger 0?

Thanks!

[William Roeder]

Only those functions that return a value (e.g. iClose, MarketInfo, etc.) must you call ResetLastError before in order to check after.