DataSet ds = Api .Zselect(MercatorUi. Globals .RepData, "select * from cli" );
if (ds == null )
     return ;
string fileName = @"c:\test\testcli.xlsx" ;
if (MercatorExporter. Exporter .Export(ds.Tables[0], MercatorExporter. ExporterFormats .Excel, fileName))
    System.Diagnostics. Process .Start(fileName);