One doubt in pro program

Our models contain hundreds of parts and (sub)assemblies...and they all have PRO/PROGRAM inside them.

Why do you need to know which components have PRO/PROGRAM?

A possible solution is to rename the components (parts/assemblies) which have PRO/PROGRAM and give them an suffix?

For example, use _PP as the sufficx, so: MYPART.PRT --> rename to --> MYPART_PP.PRT

Pro/Program is an interface to the basic workings of models. All models have a 'Program,' just like a spreadsheet has 'cells' 

In the future you could create a parameter that you can set to 'Yes' if the Program has been changed.

If you haven't deleted them, Creo creates external copies of the Program when the Program is opened to be edited. You can look for those files.

Already i did..but now i cant do rename and change...because i cant search 500+ parts..so now there is any possible do to find ?

In the model tree of your top-level assembly, type "MODELS WITH PROPROGRAM" in the search box and press enter. It will highlight the model names. You may need to expand all levels. You can also use the menu dropdown for various other queries.