Server script is written in Pascal and may have any number of functions. Functions can be called from Client script as methods of Server or AsyncServer objects.
Whan calling AsyncServer method, last parameter should be callback function.
Server script have access to following variables
New - new form values
Old - old record values
QSelect: TDMQuery - query object for select queries;
QUpdate: TDMQuery - query object for update queries;
UIClass: TWebUIClass - UI class instance
Request: TWebUIRequest - Request.
Action: TWebUIAction - action.