Receive data from client

Hello experts,

I am a server waiting for the client and receivng the data from the client periodically.When I receive the data ,I have to make some calculations on the data received and I have to paint the form accordingly.I am working in VC++ .NET.
I will be receiving the data from the client for every 10 seconds of time.I want my program to wait at the receive function till it recives the data and then paint periodically.

I made the socket non blocking but I am not able to achieve what I wanted.

Here is the sample of code......

do
{
iResult = recv(s,buffer,256,0);//I want the function to wait here till it receives the data from client for every iteration.
//do some paint opertion here.....
}wjile(iResult!=-1);