display message when only one checkbox check from 2 in datagridview

Question

I have datagridview in my program I have to create table at run time and also give primary and foreign  key at run time.
please tell me methods to do this.I have taken four cell(variable name(textbox),data type(combobox),primary key(checkbox),foreign key(checkbox)).When click check box of foreign key display message("select").
How to perform this.