How to block a user from removing users from a project

 Hi every one!

I am implementing security for the users of the fat client.

The thing is the following we have decided that only the CNC´s will be able to create, delete, projects wich was quite easy to implement.

also we have decided that only the CNC´s will be able to add or remove users from the project.

Preventing users from adding users to the project was easy because when you select a user and the clic the left arrow so that the user goes to your porject it displays a new window and on this window i have blocked the OK button, this way users will not be able to add new users to the project.