Microsoft MCSE Certification Exam 70-291

Pointers are important 70-270 data types due to special characteristics. They may be used to indicate a variable without actually creating a variable of that type. They can be a difficult concept to understand, some special effort should be spent on understanding the power they give to programmers.
Pointers have 70-284 a very descriptive name. Essentially, they point to another variable. You can make a pointer point to a variable, and then when you pass it to a function, you let the function's pointer point to the same variable, so that it can access or modify it even if it couldn't otherwise. You can even have pointers to pointers, and pointers to pointers to pointers and so 70-291 on and so forth.