C++ :: Repetitively Send Screen Bitmap Buffer Of Client To Server?

I am trying to repetitively send the screen bitmap buffer of a client to a server. The program works perfect when the client and server are running on the same machine, otherwise the server receives a distorted buffer. The distorted buffer received by the server seems to start from a byte which was not the starting byte of a buffer sent by the client (I am not sure). w=1366 and h=768 are the screen width and height respectively of both the server and the client.

Client code:

while (connect(sSocket,(sockaddr*)&addr,sizeof(addr))!=0) {}
while (!GetAsyncKeyState(VK_ESCAPE)) {
s=4*w*h;
while (s>0) {
n=send(sSocket,buf,s,0); s-=n;
for (i=0; i<s; i++) {buf[i]=buf[i+n];}
}
BitBlt(MemDC,0,0,w,h,hdc,0,0,SRCCOPY);
GetDIBits(MemDC,hBit,0,h,buf,&bmi,DIB_RGB_COLORS);
}

Server code:

do {rSocket=accept(hSocket,(sockaddr*)&addr,&addrlen);}
while (rSocket==INVALID_SOCKET);
while (!GetAsyncKeyState(VK_ESCAPE)) {
s=4*w*h; while (s>0) {n=recv(rSocket,buf,s,0); s-=n;}
SetDIBitsToDevice(hdc,0,0,w,h,0,0,0,h,buf,&bmi,DIB_RGB_COLORS);
}