:) I am going to shed some light here.... A dll is an executable program module that performs one or more functions at runtime. DLLs are not launched by the user; they are called for by an executable program or by other DLLs. So - you can't explore them, check the code, or pull them out of your indicator quick list.... It is sort of a faith based thing... you put the dll in your folder, then call it from a formula and trust it to do the right thing.... (remember... test, test, test). That is why posting the source code of the dll is so fabulous - you CAN go and see what it does even though you wouldn't ordinarily be able to do so... Does this help? :)

Hi Marilyn, Yes this sheds a lot of light on this;although I have one more question .If after dll is installed and you are using a formula or function that calls upon the dll would you know that this function is using a dll? so that way you know to scrutinize or look at the output really close;even though I look at every function really close so as to verify that its performing correctly.thanks

Thanks will do