call ShowWindow,
```
HWND hWnd = CreateWindowW(L"myWindowClass",L"My Window",WS_EX_OVERLAPPEDWINDOW | WS_VISIBLE,100,100,500,500, NULL,NULL,NULL,NULL);
ShowWindow(hWnd, SW_SHOWNORMAL);
```
call ShowWindow,
```
HWND hWnd = CreateWindowW(L"myWindowClass",L"My Window",WS_EX_OVERLAPPEDWINDOW | WS_VISIBLE,100,100,500,500, NULL,NULL,NULL,NULL);
ShowWindow(hWnd, SW_SHOWNORMAL);
```