request form filter

Hi,
I will prepare report with customer payment status. In report I take a global variable with option data type. I set this variable as a filter in my request form with 3 (full, partial, unpaid) option buttons.
What my Problem is If may I click unpaid option button only show the unpaid customer details. Tell me code.

You working in which version? AX 2012 or 2009?

Thanks,

Preeti

What Code you have tried till Now ???