First thing, try to check if the link to the sample provided on the website runs on your machine. The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.

Hi Superman :) , Thank you for your prompt reply. But i guess I am using SendMessageA only see my declaration. Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByRef lParam As Any) As Long </pre> Regards Rushi