They key to getting into the major of your choice is completing your pre-reqs. IDK what CS requires but make sure you look up the pre-reqs for admission and complete them by the end of your CAP year.
I've decided to give you some pointers are how to have a successful year as a CAP student and how to get into the major/college of your choice.
1) Complete the pre-reqs for your major/college (eg. College of Business requires Calculus I & II, Micro, and Macro economics)
2.) Research your classes and professors and try to get the classes/professors where you can make an A, this doesn't mean look for a blow-off teacher but from my expierences the difference between making an A and a C sometimes had to do with which professors you got.
3.) Sign up for orientation early so you can register before everyone else.
4.) TALK TO OTHER STUDENTS! Seriosuly, I learned more about UT and admission requirements from other students then I did from UT advisors.
5.) Don't bother calling UT with questions, they give you the cold shoulder and don't really care about you untill your admitted so rely on a good UTSA advisor (
I recommend Jennifer Uranga, she is nice and really knows her stuff)
6.) If you don't get into CS the first time and you know you can apply again, try to have your pre-reqs completed during the summer if you missed a class or two and then go to UT and take classes you can manage to get good grades in, in other words, don't take classes such as Astronomy 301 because these classes are known to be tough.
7.) If you NEED Calculus I and or II, take it at UTSA or take it over the summer at a community college because it is really tough at UT and don't let this course hold you back from getting into CS.
There are many more hints and tips I can give you so just PM me if you need extra help or advice and I'll send you my email address so we can communicate better.
Hope this helps