Set DropDown item to LookUp Result

Question

I have 2 tables in one imported Excel file. I have an Input Textbox (Search), a Drop Down List (Form) and a Label (Result).
Search pertains to Table 1, column 1 (stem). Form refers to Table 2 column 1 (form).
Table 1:
Stem 1st
2nd
==============
Going Go
Gone
Table 2:
form
==============
1st
2nd
I'm using the DropDown as a filter. In the Result Label I've tried using the following:
LookUp(Table1, Search!Text=Stem, Form!Selected in Table2!form) 
All the Result Label produces is "false". All I want to do is set the Result parameter of the LookUp function to the selected item in the DropDown List....
If you can help me, thanks. And if you could point me to some documentation, so I'm not here trying to figure random keywords (that are supposedly intuitive) out, that would be even better! :)
Also, is there a way to directly insert an Excel table, and have it scrollable in a small window, with the rows filtered?

Answer 1

You can find all documentations here.
http://technet.microsoft.com/en-us/library/dn690139(v=vs.111).aspx
That should help you with all your questions