Populating fileds

My question is how do you fetch the data from the CRM by calling the recorded

Then populating the a field

test = Test [CRM_Lookup == "8000210000000000 "]; // do i call name or the id

input.my_input_box = test.field_name_from_crm ;

but get the error test.field_name_from_crm dose not exist

How do I know if the lookup has made a matched ?

is there a simple example to get started using the scripting as i have not found anything

Thanks