#include <windows.h>

#include <iostream>

int main()

{

    HANDLE hslot;

    LPCTSTR slotname = TEXT("\\\\.\\mailslot\\demoslot");

    hslot = CreateFile(slotname, GENERIC_WRITE, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);

    if (hslot == INVALID_HANDLE_VALUE)

    {

        std::cout << "SLOT WRITING FAILED" << std::endl;

        std::cout << "PRESS KEY TO FINICH" << std::endl;

        std::cin.get();

        return 0;

    }

    std::cout << "SLOT IS WAITING" << std::endl;

    int nData;

    int n = 10;

    DWORD dwBytesWrite;

    if (!WriteFile(hslot, &n, sizeof(n), &dwBytesWrite, NULL))

    {

        std::cout << "WRITE FAILED" << std::endl;

        CloseHandle(hslot);

        std::cout << "PRESS KEY TO FINICH" << std::endl;

        std::cin.get();

        return 0;

    }

    int p = 20;

    if (!WriteFile(hslot, &p, sizeof(p), &dwBytesWrite, NULL))

    {

        std::cout << "WRITE FAILED" << std::endl;

        CloseHandle(hslot);

        std::cout << "PRESS KEY TO FINICH" << std::endl;

        std::cin.get();

        return 0;

    }
    std::cout << "Data WRITTEN TO BOX: \n" << n << "\n" << p << std::endl;

    std::cout << "PRESS KEY TO FINICH" << std::endl;

    CloseHandle(hslot);

    std::cin.get();

    return 0;

}