Hi

I am using matlab for integer programming optimization with nonlinear objective function and nonlinear constraints. I will use Genetic Algorithm as a search method. 
I am a new user of Matlab, as long as I know, GA toolbox in Matlab does not have Integer programing and I should custom my own creationfcn and mutuation functions. 
I read the toturial several times and I dont know what to do exactly. 
So in my objective function formulation, I defined a integer generator for input variables but it didnt work. I mean the output of the model is not integer. 
Would you please help me in a very simple words, how to create input functions in optimset? the examples of the tutorial are not easy to understand.

Thanks