Event triggered when closing F4 search help

Hello

I have 3 input fields on my view and only the first is set to editable,so that the user can enter a value.Only after entering a valid value will the other 2 fields be made editable.

My problem is that i open the search help for the first input field and choose a value and press enter. I would like to know if there is any event that is triggered when choosing a value and closing the search help so that the other 2 input fileds will become editable automatically when i press the ok button in the search help.

I do not want to choose a value from my search help and then press enter one more time so that my fields will become editable and the event handler for my input field will be called.

thank you