Disassemblers are used to view the low-level code of a program. Reading low-level code requires knowledge of assembly language. Analysis done with a disassembler gives information about the execution conditions and system interactions that a program will carry out when executed. However, the highlights when reading low-level code are when the program uses Application Program Interface (API) functions. The following screenshot shows a code snippet of a program module that uses the GetJob() API. This API is used to get information about the printer job, as shown here: