uninstall query

Hi All ,
This is my first msg in this group hope i'll get help n some idea, ok now time for the problem.... i have developed a simple MFC dialog based

program which when runs creates few txt file which holds simple numeric

data which i use during the operation of the program, now my requirement is ... whenever i uninstall the program all files including

the folder / sub folder should get deleted, i am not using any DLL in my program.