Hi,
Your best bet is to use the Object Browser to see all the available
functions. From there you can highlight one and then press F1.
This will take you directly to the help topic for that function.
For Example, from within any code module, press F2 to bring up the object browser.
In the combo box in the upper left, select a library, lets say you select VBA.
Right away you'll see quite few functions listed in the right hand pane.
If you select Math from the Classes, you'll see all the math functions.
Same thing if you select Strings.
The Object Browser is very_usefull once you know how to use it.