#include <windows.h>

//プロトタイプ宣言
HWND InitWindow(void);
LRESULT CALLBACK WndProc(HWND hwnd, UINT message,WPARAM wParam, LPARAM lParam);

//定数
#define Button1		100
#define Button2		101
#define Button3		103

//グローバル変数
HINSTANCE g_hInstance;

/////////////////////////////////////////////////////////////////////////////
//WinMain関数
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
				LPSTR lpszCmd, int nCmdShow)
{
	MSG msg;

	g_hInstance = hInstance;
	InitWindow();
 
	//メッセージループ
	while (GetMessage (&msg, NULL, 0, 0))
	{
		TranslateMessage (&msg);
		DispatchMessage (&msg);
	}
	return msg.wParam;
}

/////////////////////////////////////////////////////////////////////////////
//ウィンドウを作る関数
HWND InitWindow(void)
{
	HWND hWnd;
	LPCTSTR szclassName = "succ";
	WNDCLASSEX wcex;

	ZeroMemory((LPVOID)&wcex, sizeof(WNDCLASSEX));

	//ウィンドウクラスを登録
	wcex.cbSize			= sizeof(WNDCLASSEX);
	wcex.style			= 0;
	wcex.lpfnWndProc	= WndProc;
	wcex.cbClsExtra		= 0;
	wcex.cbWndExtra		= 0;
	wcex.hInstance		= g_hInstance;
	wcex.hIcon			= NULL;
	wcex.hCursor		= LoadCursor(NULL,IDC_ARROW);
	wcex.hbrBackground	= ( HBRUSH)( COLOR_WINDOW+1);
	wcex.lpszMenuName	= NULL;
	wcex.lpszClassName	= szclassName;
	wcex.hIconSm		= NULL;
	RegisterClassEx(&wcex);

	//ウィンドウ作成
	hWnd=CreateWindowEx(0,szclassName,"ウィンドウのタイトル",WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT,CW_USEDEFAULT,
		CW_USEDEFAULT,CW_USEDEFAULT,
		NULL,NULL,g_hInstance,NULL);

	//ウィンドウ表示
	ShowWindow(hWnd, SW_SHOW);
	UpdateWindow(hWnd);

	return hWnd;
}

/////////////////////////////////////////////////////////////////////////////
//ウィンドウプロシージャ
LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
						 WPARAM wParam, LPARAM lParam) 
{
	switch (message)
	{
	case WM_CREATE:
		CreateWindow("BUTTON", "メモ帳を起動！", WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 10, 10,
			150, 25, hwnd, (HMENU)Button1, g_hInstance, NULL);
		CreateWindow("BUTTON", "電卓を起動！", WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 10, 36,
			150, 25, hwnd, (HMENU)Button2, g_hInstance, NULL);
		CreateWindow("BUTTON", "WordPadを起動！", WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 10, 62,
			150, 25, hwnd, (HMENU)Button3, g_hInstance, NULL);
		return 0;
	case WM_COMMAND:
		switch(LOWORD(wParam))
		{
		case Button1:
			ShellExecute(NULL,"open","notepad.exe",NULL,NULL,SW_SHOWNORMAL);
			break;
		case Button2:
			ShellExecute(NULL,"open","calc.exe",NULL,NULL,SW_SHOWNORMAL);
			break;
		case Button3:
			ShellExecute(NULL,"open","wordpad.exe",NULL,NULL,SW_SHOWNORMAL);
			break;
		}
		return 0;
	case WM_CLOSE:
		DestroyWindow(hwnd);
		return 0;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return (DefWindowProc(hwnd,message,wParam,lParam));
	}
	return 0L;
}