1. 注册窗口

WNDCLASSEX wndClass;
memset(&wndClass, 0, sizeof(WNDCLASSEX));
wndClass.cbSize        = sizeof(wndClass);
wndClass.style         = CS_VREDRAW | CS_HREDRAW;
wndClass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
wndClass.hCursor       = ::LoadCursor(NULL, IDC_ARROW);
wndClass.lpszClassName = _T("CELLWinApp");
wndClass.lpfnWndProc   = myWindowProc;
wndClass.hIcon         = LoadIcon(NULL, IDI_ERROR);
wndClass.lpszMenuName  = 0;
wndClass.hInstance     = mInstance;
RegisterClassEx(&wndClass);

2.创建窗口

mHwnd = CreateWindow(_T("CELLWinApp"), _T("CELLWinApp"), WS_OVERLAPPEDWINDOW, 0, 0, 
    width, height, 0, 0, mInstance, this);
if (mHwnd == 0) {
    goto END;
}

3. 更新并显示

UpdateWindow(mHwnd);
ShowWindow(mHwnd, SW_SHOW);

4.创建消息循环

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

5. 消息循环简单实现

LRESULT CALLBACK CELLWinApp::myWindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch (msg) {
    case WM_CLOSE:
        PostQuitMessage(0);
        return 0;
    default:
        return DefWindowProc(hWnd, msg, wParam, lParam);
    }
}