The OnReportExecuteEnd Event occurs at the end of the Report Execution process. This Event could be used to track which report executions return data.
For custom code the args array is structured as follows:
args contains a single Boolean indicating if Data qualified (True), or not (False).
For .Net Assemblies the method signature is as follows:
string EventHandlerName(SessionInfo sessionInfo, bool DataQualified)
Anything can be returned to the OnReportExecuteEnd Event. Any return value will be ignored.