Report Builder specifies this constant in a SAM_ReportNotify message's lParam. Report Builder sends the SAM_ReportNotify message when it has formatted a block, but before it is actually output. When you process SAM_ReportNotify, you can check the lParam parameter value to see which part of the report Report Builder is ready to process. RPT_OutputDetail indicates that Report Builder is ready to process the detail block. Value = 26

public const int RPT_OutputDetail