Thanks to all
Phil, as u suggested I downloaded and install Orpheus.And added TOvcSpinner control.so removed error of undefined identifier TSpinButton.
How to include Include the Lazarus LclIntf unit .Please chk syntax what I have done:
uses
LCLIntf,
Is it correct way of including unit??? As I am not getting error..but just want to confirm it.
Thanks & Regards
Vini7