I would recommend that you register with BO to get access to the tech support website. Although there are reference documents that accompany the SDK, there is little in the way of worked examples to help you understand how to use it. As I have never come across any text books that go beyond the basics, the web site is the only source of worked examples. Some knowledge of VBA is also going to be extremely useful. Still, it is worth persevering. I am still a novice in this area but I have managed to achieve my original objectives and I am now quite excited about the potential that incorporating VBA has brought to BusinessObjects.