I wanted to kno if there is any mechanism to to notify the server that the data sent (by the server) has been succesfully received by the client.

My server send text messages in intervals and on every receive i need to tell the server to resend that message if i dont receive it.

Im using winsock2.

thnx in advance

By its architecture TCP resends the data in case of a mishap on the way. Although you can always have extra checks by doing manual checksum checking to ensure problemless transport in case of something like a connection loss etc.