For a project containing help; set the resource.hm file attributes to
include read only.
Uncheck Tools->Options->Environment->Documents->Edit read only files.
Open Project
Open Resource View
In Resource View, expand project.rc
Expand dialog

Notice that all dialog IDs have been replaced with the ID number rather than
the defined name.
Open the dialogs one at a time (pretend that you're searching for a specific
dialog)
Notice that any DateTime pickers on the dialog revert from time format to
short date format
(be sure to change them back to time format before moving to next dialog)

Modify the last dialog and save your work.
Close your project.

Open the Project.rc file with notepad.
Notice that all IDD_XXX names are now numbers.
Manually edit your rc file to restore the names.

Check Tools->Options->Environment->Documents->Edit read only files
Now you're ok.