i am using visual studio and C#asp.net code when I can to get to a definition of a method I just take my cursor to the name of the method and press F12 and then my cursor get to the definition of the correct page and the correct location
now I am use asp classic code I cant find any way to do the same as I did for my C# code
for find my definition of method I just have to find all and look the definition by my eyes look on a lot of calls of the methods