I have an ASP.NET with VB.NET ( Version 2010) page . On click of a button it is doing a little time consuming process called RunBehind .
The user should not modify fields in the form when the process is running
What I am looking for is
When the RunBehind process is started open a Modal window ( Or when the Button is clicked)
Close the Modal window when the Process is finished
Can someone give me code sample for this ?