how can we add the registered .net components to our application

Question

i am creating a framework like application. in that run time i wanted to add different .net controls and design and again i wanted to run the things which designed any way that that is not needed now. what i want is in our application during run time if we click a button named .net controls the .net controls registered in the system has to appear in a window and from there i have to select the controls and add it in to the application .
how can we achieve this
please replay me
 
regards
 
ginnas