Volume retrieving in Market Profile indicator?

[SteelAce]

Market Profile indicator is (as if) based on trading volumes. Maybe I am blind, but I cannot see the place in the indicator where it reads volume. As I can imagine volume reading command must be something like CopyRates, CopyTicks, SymbolInfoTick... I cannot see these, can anybody see?

[William Roeder]

TPOperPrice[(int)(price / onetick)]++;

Because it doesn't use volume. It count's how many bars contained a given price.