srv_wsendmsg (Extended Stored Procedure API)
This feature will be removed in a future version of Microsoft SQL Server. Do not use this feature in new development work, and modify applications that currently use this feature as soon as possible. Use CLR integration instead.
Sends a Unicode message to the client.
Use this function to send messages in Unicode. It is similar to srv_sendmsg, but the message it sends is a WCHAR string rather than type DBCHAR string. Note that message length is reported in characters rather than bytes, and msglen will never be equal to SRV_NULLTERM.
The function returns FAIL when
The msglen given is not in the range of 0-32242.
The msglen given is 0 but the message pointer is NULL.
There is error when sending the error message through network.
You should thoroughly review the source code of extended stored procedures, and you should test the compiled DLLs before you install them on a production server. For information about security review and testing, see this Microsoft Web site.