Hi Ajith,
in SBO 9.1 you can still use the B1DE style of coding.
In term of code wise, no changes are needed.
You need to change the SAPbobsCOM and SAPbouiCOM reference though.
And i am not sure whether you will need to recompile the B1WizardBase to reference the 9.1 DI + UI api.
Also you will need to check the difference between 8.82 to 9.1 a view object in 8.82 is not supported in 9.1 anymore such as the old stock counting object which has changed to a service starting in 9.0
Regards
Edy