Disable create and discard button for specific function in OpenERP

I have been developing module for OpenERP-7. I wanted to know that how can I disable create/delete button for specific function. Like I am clicking on a button to open a tree view. All I want is to disable the create button form top of that tree view. How can I achieve this in OpenERP. I dont have any other ml view for this tree view. I am calling the only tree view. But this time I dont need the create/discard button. Can anyone guide me how to do this. Hopes for suggestion and guidance