switch 中 return跟break的区别

switch 中 return和break的区别?
//下面代码中把switch中 的return语句换成break语句有什么区别吗？我搞不懂他们之间的区别了，希望能解析下

#include<windows.h>

#include"resource.h"


LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);


int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)

{

	static TCHAR szAppName[]  = TEXT("lige");


	HWND    hwnd;

	MSG     msg;


	WNDCLASS wndclass;


	wndclass.cbClsExtra       = 0;

	wndclass.cbWndExtra       = 0;

	wndclass.hbrBackground    = (HBRUSH)GetStockObject(BLACK_BRUSH);

	wndclass.hCursor          = LoadCursor(NULL,IDC_ARROW);

	wndclass.hIcon            = LoadIcon(hInstance,MAKEINTRESOURCE(IDI_ICON1));

	wndclass.hInstance        = hInstance;

	wndclass.lpfnWndProc      = WndProc;

	wndclass.lpszClassName    = szAppName;

	wndclass.lpszMenuName     = MAKEINTRESOURCE(IDR_MENU1);

	wndclass.style            = CS_HREDRAW | CS_VREDRAW;


	if (!RegisterClass(&wndclass))

	{

		MessageBox(NULL,TEXT("注册窗口类失败！"),TEXT("失败"),MB_OK | MB_ICONERROR);

		return 0;

	}


	hwnd = CreateWindow( szAppName,

		                 TEXT("测试程序"),

						 WS_OVERLAPPEDWINDOW,

						 CW_USEDEFAULT,

						 CW_USEDEFAULT,

						 CW_USEDEFAULT,

						 CW_USEDEFAULT,

						 NULL,

						 NULL,

						 hInstance,

						 NULL );


	ShowWindow(hwnd,SW_SHOWNORMAL);

	UpdateWindow(hwnd);

 

	while (GetMessage(&msg,NULL,0,0))

	{

		TranslateMessage(&msg);

		DispatchMessage(&msg);

	}


	return msg.wParam;

}



LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)

{

	HDC     hdc;

	PAINTSTRUCT ps;


	switch (message)

	{

	case WM_CREATE:

		return 0;


	case WM_COMMAND:

		switch (LOWORD(wParam))

		{

		case IDM_OPEN:

			return 0;


        case IDM_CLOSE:

			SendMessage(hwnd,WM_CLOSE,0,0);

			return 0;

		}


	case WM_PAINT:

		hdc = BeginPaint(hwnd,&ps);

		EndPaint(hwnd,&ps);

		return 0;


	case WM_CLOSE:

		if (IDYES == MessageBox(NULL,TEXT("是否要退出？"),TEXT("退出"),MB_YESNO))

		{

			DestroyWindow(hwnd);

		}

		return 0;


	case WM_DESTROY:

		PostQuitMessage(0);

		return 0;

	}

	return DefWindowProc(hwnd, message, wParam, lParam);

}

------解决方案--------------------
break  跳出最近一层的嵌套
return 函数返回（如果有的话有返回值的返回结果）。
------解决方案--------------------
return函数就直接返回了。break只是跳到switch的外面，继续执行后面的代码。