To help you get started programming, you can use the shipping examples for your ADE. For more information, refer to Creating an Application with NI-RFmx topic in this help reference.
You can also visit NI's extensive library of technical support resources at ni.com/support.
You can use NI I/O Trace to analyze the functions you have called in the API with NI application software. With NI I/O Trace, you can watch the order of execution of the application and locate errors as they happen.