#include <windows.h>

const char *ClsName = "BasicApp";
const char *WndName = "A Simple Window";

LRESULT CALLBACK WndProcedure(HWND hWnd, UINT uMsg,
                           WPARAM wParam, LPARAM lParam);

INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
               LPSTR lpCmdLine, int nCmdShow)
{
        MSG        Msg;
        HWND       hWnd;
        WNDCLASSEX WndClsEx;

        // Create the application window
        WndClsEx.cbSize        = sizeof(WNDCLASSEX);
        WndClsEx.style         = CS_HREDRAW | CS_VREDRAW;
        WndClsEx.lpfnWndProc   = WndProcedure;
        WndClsEx.cbClsExtra    = 0;
        WndClsEx.cbWndExtra    = 0;
        WndClsEx.hIcon         = LoadIcon(NULL, IDI_APPLICATION);
        WndClsEx.hCursor       = LoadCursor(NULL, IDC_ARROW);
        WndClsEx.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
        WndClsEx.lpszMenuName  = NULL;
        WndClsEx.lpszClassName = ClsName;
        WndClsEx.hInstance     = hInstance;
        WndClsEx.hIconSm       = LoadIcon(NULL, IDI_APPLICATION);

        // Register the application
        RegisterClassEx(&WndClsEx);

        // Create the window object
        hWnd = CreateWindow(ClsName,
                          WndName,
                          WS_OVERLAPPEDWINDOW,
                          CW_USEDEFAULT,
                          CW_USEDEFAULT,
                          CW_USEDEFAULT,
                          CW_USEDEFAULT,
                          NULL,
                          NULL,
                          hInstance,
                          NULL);
       
        // Find out if the window was created
        if( !hWnd ) // If the window was not created,
                return 0; // stop the application

        // Display the window to the user
        ShowWindow(hWnd, SW_SHOWNORMAL);
        UpdateWindow(hWnd);

        // Decode and treat the messages
        // as long as the application is running
        while( GetMessage(&Msg, NULL, 0, 0) )
        {
             TranslateMessage(&Msg);
             DispatchMessage(&Msg);
        }

        return Msg.wParam;
}

LRESULT CALLBACK WndProcedure(HWND hWnd, UINT Msg,
                           WPARAM wParam, LPARAM lParam)
{
    switch(Msg)
    {
    // If the user wants to close the application
    case WM_DESTROY:
        // then close it
        PostQuitMessage(WM_QUIT);
        break;
    default:
        // Process the left-over messages
        return DefWindowProc(hWnd, Msg, wParam, lParam);
    }
    // If something was not done, let it go
    return 0;
}