opening exe files, comercial version vs opensource

[Gily]

thanks . I am subscribed .
Another question:

I need to create a dialog that will be activated from the main menu
I want the function to open a dialog that the user can choose color.
I read I need to use ColorListEditor . still not sure if I need to create a widget? if I understand correctly no need to delete it later?
what widget to I need to use? is it a window? do I need to implamant it?
it is common to create new class for this window? or do you usualy create a base class that handle all wndows in the application?
or do I just inhirate the needed widjet to the function that handle the image?
hope I am clear
thanks