Need the assigned to user change

[cent]

Hi Friends,
I need a modification in my Schedule meeting QuickCreate form . I need to assigned to field as the record owner (not the current user logged in) and make that field disabled(cannot select another one) , I just attach a screenshot I need below



Please help me with a solution , I use SugarCE v 6.5.4.

thanks
Anes

[Angel]

This post has an example that will help you with the first part, just alter it so instead of assigning a specific user, it instead uses the owner ID:

Angel's Blog: SugarCRM Customization: Default Assigned User

This other post may help you with the second part, but I haven't tried it on Assigned To fields to tell you for sure if it will work:

Angel's Blog: SugarCRM Customization: Read-only Fields