WindowAppExample.cpp

WindowAppExample.cpp

#include <Windows.h>

LRESULT CALLBACK WndProc(
    _In_ HWND   hWnd,
    _In_ UINT   msg,
    _In_ WPARAM wParam,
    _In_ LPARAM lParam) {

    switch (msg) {

    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }

    return DefWindowProc(hWnd, msg, wParam, lParam);
}

int APIENTRY wWinMain(
    _In_     HINSTANCE hInstance,
    _In_opt_ HINSTANCE hPrevInstance,
    _In_     LPWSTR    lpCmdLine,
    _In_     int       nCmdShow) {

    const TCHAR szTitle[]       = TEXT("Example Windows App");
    const TCHAR szWindowClass[] = TEXT("Example Windows App");

    WNDCLASSEX wc = {
        .cbSize = sizeof(wc),
        .lpfnWndProc = WndProc,
        .hInstance = hInstance,
        .lpszClassName = szWindowClass,
    };

    if (!RegisterClassEx(&wc)) {
        return 1;
    }

    HWND hWnd = CreateWindowEx(
        0,                      // No extended style
        szWindowClass,          // Class name
        szTitle,                // Window title
        WS_OVERLAPPEDWINDOW,    // Window style
        CW_USEDEFAULT,          // Initial x position
        CW_USEDEFAULT,          // Initial y position
        1280,                   // Width
        720,                    // Height
        nullptr,                // No parent window
        nullptr,                // No menu
        wc.hInstance,           // Instance handle
        nullptr);               // No additional data

    if (!hWnd) {
        return 1;
    }

    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);

    MSG msg;
    while (GetMessage(&msg, nullptr, 0, 0) > 0) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    DestroyWindow(hWnd);
    UnregisterClass(wc.lpszClassName, wc.hInstance);
    return 0;
}