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JNjenga/skeleton_win32_app.cpp

Created May 22, 2024 19:30
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  1. JNjenga created this gist May 22, 2024.
    91 changes: 91 additions & 0 deletions skeleton_win32_app.cpp
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,91 @@
    #ifndef UNICODE
    #define UNICODE
    #endif

    #include <windows.h>

    #pragma comment(lib, "kernel32")
    #pragma comment(lib, "user32")

    HWND create_window(const wchar_t* class_name, WNDPROC windproc, const wchar_t* window_name, HWND parent, HINSTANCE h_instance, int x, int y, int w, int h);
    LRESULT CALLBACK windproc_callback(HWND hwnd, UINT u_msg, WPARAM w_param, LPARAM l_param);

    int WINAPI wWinMain(HINSTANCE h_instance, HINSTANCE h_previnstance, PWSTR p_cmdline, int n_cmdshow)
    {
    const wchar_t* class_name = L"Skeleton win32 app";
    const wchar_t* window_name = L"Skeleton win32 app";

    HWND hwnd_parent = create_window(class_name, windproc_callback, window_name, NULL, h_instance, 0, 0, CW_USEDEFAULT, CW_USEDEFAULT);

    ShowWindow(hwnd_parent, n_cmdshow);

    MSG msg = {};

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

    return 0;
    }

    HWND create_window(const wchar_t* class_name, WNDPROC windproc, const wchar_t* window_name, HWND parent, HINSTANCE h_instance, int x, int y, int w = 0, int h = 0)
    {
    WNDCLASS wc = {};

    wc.lpfnWndProc = windproc;
    wc.hInstance = h_instance;
    wc.lpszClassName = class_name;

    RegisterClass(&wc);

    HWND hwnd = CreateWindowEx(
    0,
    class_name,
    window_name,
    WS_OVERLAPPEDWINDOW,
    x ? x : CW_USEDEFAULT, y ? y : CW_USEDEFAULT,
    w ? w : CW_USEDEFAULT, h ? h : CW_USEDEFAULT,
    parent, // Parent
    NULL,
    h_instance,
    NULL
    );

    return hwnd;
    }

    LRESULT CALLBACK windproc_callback(HWND hwnd, UINT u_msg, WPARAM w_param, LPARAM l_param)
    {
    switch(u_msg)
    {
    case WM_DESTROY:
    {
    PostQuitMessage(0);
    return 0;
    }
    break;
    case WM_CREATE:
    {
    }
    break;
    case WM_COMMAND:
    {
    }
    break;
    case WM_PAINT:
    {
    PAINTSTRUCT ps;
    HDC hdc = BeginPaint(hwnd, &ps);

    FillRect(hdc, &ps.rcPaint, (HBRUSH)(COLOR_WINDOW + 1));

    EndPaint(hwnd, &ps);
    return 0;
    }
    break;
    }

    return DefWindowProc(hwnd, u_msg, w_param, l_param);
    }