how convert HTML to WML

Question

HELP ME!

i'm doing a project, using Mobile ASP.NET
this project is mobile portal, i have some troubles,
I WANT TO convert HTML to WML directly,
Could you tell me how to transform a HTML file to WML for a mobile client?
I know that there are some compact programs can do it such as: tidy.exe , but I want to source, and some methods about it.
I'm looking forward to ideas of everybody
Thanks you very much!