>I want create my exe files as soon as possible small size inthis case ,how can I use my forms,prg,frx etc. in one or more DLL file. when I want to create DLL I am receiving this error "cannot build a Dll without ole public classes"

THats because the DLLs you are build are COM Servers, which is not what you want, I think. Build them as seperate EXEs instead of DLLs and you should be fine