You have an object that uses the IHTMLEventObj::put_keyCode function. When you use the object in Internet Explorer 9 Standards mode, the object does not work as documented. In this case, you see the return value is S_OK. Additionally, the key is not displayed in the input field as expected.
Note The object works as expected in Internet Explorer 6, Internet Explorer 7, and Internet Explorer 8 environments.
To resolve this problem, install this update.
Security update information
To resolve this issue, install the most recent cumulative security update for Internet Explorer. To do this, visit the following Microsoft website: