C# comboBox to label and other help needed

Question

ok i'm running into some major problems with a calculator i'm making its been 3 years scents I've done any programming and i what i do remember is useless (just some html codeing {which isn't even enough to get a web page work} so ya) needless to say i've been trying to with no success.As far as what i'm using to make the calculator its "c#" and thats the programing codex that i remember most to make programs. heres a link to the album of the program with the concept of what i'm trying to do.http://tempuri.org/tempuri.htmlAny help is greatly appreciatedp.s i remember how to get a label to show a text but i don't remember how code it for it to show.Thanks for all the help,Rsking (co-founder and  Guild Leader for the Fire of the Dragon guild, Saralona sever, Dungeons and Dragons Online)