Can someone please explain the function of "n" in the DDE syntax "idn." For example, in the TwsDde.xls workbook, on the Tickers page, when using the function
=server|tik!idn?last
in a cell to obtain the Last price, the "n" starts at 0 and increases by one each time you Clear Links and then again Request Market Data (but it obtains the same data each time). However the identical function that I've placed in another section of the workbook does not change (the "n" does not increase in value). So, on the Tickers page there would be "id1" or "id2" etc. while on another page it would retain the original "id0" both having identical prices.
My question is, How is the "n" value increasing and what is the purpose of the increasing "n" value when it is being utilized (in this example) to obtain the Last price?
(IB's DDE documentation only states, "id= idn, where n is some integer. For orders, n must always increase, even from session to session.")
=server|tik!idn?last
in a cell to obtain the Last price, the "n" starts at 0 and increases by one each time you Clear Links and then again Request Market Data (but it obtains the same data each time). However the identical function that I've placed in another section of the workbook does not change (the "n" does not increase in value). So, on the Tickers page there would be "id1" or "id2" etc. while on another page it would retain the original "id0" both having identical prices.
My question is, How is the "n" value increasing and what is the purpose of the increasing "n" value when it is being utilized (in this example) to obtain the Last price?
(IB's DDE documentation only states, "id= idn, where n is some integer. For orders, n must always increase, even from session to session.")
