Hi sanjeev,
Thank you for your interest in Essential XlsIO.
In order to make XlsIO to use YIELD() function we need to register it as custom add-in function and make XlsIO also recognize it. We can do that by using the following code snippet:
//Define Function
IAddInFunctions unknownFunctions = workbook.AddInFunctions;
unknownFunctions.Add( "YIELD" );
//Use Function
sheet.Range[ "A3" ].Formula = "YIELD(A1+\" CORP\",\"PX_LAST\")";
Please refer the sample in the below link which illustrates the above:
http://websamples.syncfusion.com/samples/XlsIO.Windows/71824/main.htmPlease let me know if this helps.
Regards,
G.Yavana