Hi Narendra,
This is a known issue # 825 in v.3.3, which has been fixed internally in our source code.
TabControlAdv causes a PInvoke related crash in VS 2005 RC1
If you are interested in receiving a private patch build containing this fix, please create a Direct-Trac incident in this regard mentioning the forum post number in the subject line. Note that this is an internal build and it should be used for testing purposes only.
Please let me know if you have any questions. Thanks for using Syncfusion products.
Regards,
Mano