Can any one can help me how to Capture Electronic Signature using C# ?

Hi Friends,

My C# application launch or open the Infopath form.
After it (Infopath form) is opened I need to do the following.

I will have to include the following action in the Infopath form (For information: This form is being launched/open from C# application).

1.How to capture Electronic Signature (not digital signature) in Infopath 2003. Do I need to use signature pad.

If so please give some information on that(Is it third party tool?, need to write C# code for that?..etc).

It is very urgent..Please let me know ASAP.

Please guide me to solve this problem.
Many thanks in Advance..

Regards
Radhakrishnan