Hi Sathish,
Here are the details for your questions.
1. We should have the ability to start with negative(-)
Please refer the following sample for allowing both positive and negative number with the mentioned number format
Sample:
http://websamples.syncfusion.com/samples/Grid.Windows/F67763/main.htm2. Could you please give us a small description about the purpose of "#" in the format.
Please refer to the following link for the details of # formatting
http://idunno.org/archive/2004/14/01/122.aspxKindly take a look and let me know if you have any questions.
Regards,
Ajish