>>
>>You should consider a thin client solution...
>
>Yes I understand. I could rewrite the existing software (I've been more or less working in 3 thier) using com but that would take some time. 've never compiled a .dll in my life (if you see what I mean).
>
>Anyway... thanks....

Thin client is not a rewrite in com, it is a solution to exactly what you are running. Have you ever run pcAnywhere, Terminal Server, etc. That's thin client.

Your users will run a small client software on their computer which will connect to a server at your office. The server is where the actual application will run - with only the drawing of the screen sent to your client's machines. It is very fast, and a perfect fit for what you describe.

Take a look here... http://www.microsoft.com/windows2000/technologies/terminal/default.asp