To populate check mark or X in checkbox field in PDF

Hi,

I have a form which has the checkboxes.  I have a screen to capture the inputs of the form from user where I am using multiple checkbox field to capture an answer.  Then I need to generate the PDF of that form.  I am facing the challenge to fill the tick mark or X in the box in the checkbox field in PDF.  How can I accomplish this? Any help?

Thanks,

Brinda Sateesh