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Win32用見えないウィンドウ&メッセージループ

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Win32でマルチスレッドにする時にメッセージループが挟まってると管理が便利かなと思って作ってみました。

[GitHub] Invisible Window for Windows 10

#include    <windows.h>

const char *strClassName = "UnvisibleWindowClass";
const char *strTitle= " UnvisibleWindow";

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_DESTROY:
        PostQuitMessage(0);
        break;

    default:
        return DefWindowProc(hwnd, message, wParam, lParam);
    }
    return 0;
}

//
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);

    // ウィンドウクラスの登録
    WNDCLASSEX wcex = { };
    wcex.cbSize         = sizeof(WNDCLASSEX);
    wcex.style          = WS_EX_NOACTIVATE;
    wcex.lpfnWndProc    = WndProc;
    wcex.cbClsExtra     = 0;
    wcex.cbWndExtra     = 0;
    wcex.hInstance      = hInstance;
    wcex.hIcon = nullptr;
    wcex.hCursor = nullptr;
    wcex.hbrBackground = nullptr;
    wcex.lpszMenuName   = nullptr;
    wcex.lpszClassName  = strClassName;
    wcex.hIconSm        = nullptr;

    if(!RegisterClassEx(&wcex)) return 0;

    // ウィンドウ作成
    HWND hwnd;
    hwnd = CreateWindowEx(WS_EX_NOACTIVATE, strClassName , strTitle, WS_DISABLED /*WS_OVERLAPPEDWINDOW*/,
            0, 0, 1, 1,
            nullptr, nullptr, hInstance, nullptr);
    if (!hwnd) return 0;

    ShowWindow(hwnd, SW_HIDE); // Window非表示

    // メッセージループ
    MSG msg = { };

    while (WM_QUIT != msg.message)
    {
        if (PeekMessage(&msg, nullptr, 0, 0, PM_REMOVE))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
        else {
            // ここにメインタスクの処理を書く
            // 更新時間を計ったりする
            Sleep(1);       // dummy
        }
    }

    return msg.wParam;
}
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