C++ windows api 最基本的窗口代码段(抄书)

#include<windows.h>
//#include<string.h>
#include<stdlib.h>
//using namespace windows;
LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
BOOL InitWindowsClass(HINSTANCE hInstance);
BOOL InitWindows(HINSTANCE hInstance,int nCmdShow);
//以下初始化窗口类
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInst,LPSTR IpszCmdLine,int nCmdShow)...{
    MSG msg;
    if(!InitWindowsClass(hInstance))
        return FALSE;
    if(!InitWindows(hInstance,nCmdShow))
        return FALSE;
   
    //创建窗口
  
    while(GetMessage(&msg,NULL,0,0))
    ...{
    TranslateMessage(&msg);
    DispatchMessage(&msg);
    }
    return msg.wParam;
}
//窗口函数
LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lparam)
...{
switch(message)
...{
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd,message,wParam,lparam);
}
return 0;
}
BOOL InitWindows(HINSTANCE hInstance,int nCmdShow)...{
    HWND hwnd;
    hwnd=CreateWindow("窗口",
        "My_Windows",
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        NULL,
        NULL,
        hInstance,
        NULL);
    if(!hwnd) return FALSE;
    ShowWindow(hwnd,nCmdShow);
    UpdateWindow(hwnd);
    return TRUE;

}
BOOL InitWindowsClass(HINSTANCE hInstance)...{
    WNDCLASS wc;
    wc.style = 0;
    wc.lpfnWndProc = (WNDPROC)WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(hInstance,IDI_APPLICATION);
    wc.hCursor = LoadCursor(hInstance, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)GetStockObject(LTGRAY_BRUSH+3);//(COLOR_WINDOW+1);
    wc.lpszMenuName = NULL;
    wc.lpszClassName ="窗口";
    return RegisterClass(&wc);
}