#include <Windows.h>
#include <iostream>

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    std::cout << "ID message=" << std::hex << message << std::endl;
    switch(message)
    {
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    case WM_TOUCH:
        std::cout << "touch event" << std::endl;
        break;
    default:
        return DefWindowProc(hwnd, message, wParam, lParam);
    }

    return 0L;
}

HWND InitMessageOnlyWindow(HINSTANCE hInstance, int nCmdShow) {
    LPWSTR szWindowClassName = TEXT("msgOnly");

    WNDCLASSEX windowClass;
    memset(&windowClass, 0, sizeof(windowClass));
    windowClass.cbSize = sizeof(windowClass);
    windowClass.hInstance      = hInstance;
    windowClass.lpfnWndProc    = WndProc;
    windowClass.lpszClassName  = szWindowClassName;
    if(RegisterClassEx(&windowClass)==0) {
        std::cerr << "RegisterClass" << std::endl;
        return 0;
    }

    HWND hWindow = CreateWindow(
        szWindowClassName,
        L"",
        0,
        0, 0, 0, 0,
        HWND_MESSAGE,
        NULL, hInstance, NULL);
    if (!hWindow) {
        std::cerr << "CreateWindow" << std::endl;
        return 0;
    }

    if(RegisterTouchWindow(hWindow, 0)==0) {
        std::cerr << "RegisterTouchWindow" << std::endl;
        return 0;
    }

    return hWindow;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {

    HWND hWindow = InitMessageOnlyWindow(hInstance, nCmdShow);

    if(IsTouchWindow(hWindow, 0))
        std::cout << "The window is touch enabled." << std::endl;

    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return (int)msg.wParam;
}