I Just LOCKED the Results subform in the property menu. It looks that no user can add/modify the data. The disadvantage is that if we select the entire row then if we click on delete then the row is going to be deleted. I needed to lock this delete option too.
Coming to your above reply :
If I click on No option as seen in the above image then am unable to enter anything into the search boxes. The search boxes itself getting locked too if I follow the above method.
NOTE : Am sure that am clicking on the open space so that nothing is selected. I can say that I changed the general settings of the form.