Crystal Reports - Did it change???

I have been trying to do various things with crystal reports for the past couple of days. Such as changing report variables programmitically in the crystalreportviewer and changing the connection info programmitically on the viewer. I have searched the internet for tutorials/code, but everything that i found.. uh.. had objects being declared that don't exist and methods that don't exist:confused:... I am using crystalreports 9 with the viewer on visual studio .net 2003.