How to use same database for Web and desktop application

Question

hello boddies,

I am working on online cinema booking system, my client want that advance booking can done by windowsform and from website both. when advance booking gets done that got one no. by which they can collect ticket from cinema place.

so i done that thing in windows form advance booking running nicely but how to do on website if i use different database that booking will not same and may one seat is going to book at one time in window form and web form.

If anybody have some suggestion regarding that matter please let me know

Thank a lot in advance !!!