Windows application has stopped working. Error message

Question

Hi

I have a windows application that uses webservices to interact with SQL database. The application was working yesterday but when the users tried to access it this morning it would not open. When the exe is clicked on the wait cursor appears and then a windows dialog box appears with the message "ApplicationName has stopped working".

Does anybody know what causes this and how do I fix this?

Thanks in advance.

Thav