關機程序代碼

【轉載請註明出處：http://blog.csdn.net/zjbpku/article/details/7756807】

1.使用vc 建立win32 Application 工程，點擊OK，選擇“A typical “Hello World” Application，選擇finish---->OK

2.在程序中添加如下代碼 ：

BOOL EnableShutDownPriv()
{
	HANDLE hToken = NULL;
	TOKEN_PRIVILEGES tkp = {0};
	if ( !OpenProcessToken( GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken ) ) {
		return FALSE;
	}
	if ( !LookupPrivilegeValue( NULL, SE_SHUTDOWN_NAME, &tkp.Privileges[0].Luid ) ) {
		CloseHandle( hToken );
		return FALSE;
	}
	tkp.PrivilegeCount = 1;
	tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
	
	if ( !AdjustTokenPrivileges( hToken, FALSE, &tkp, sizeof(TOKEN_PRIVILEGES), NULL, NULL ) ) {
		CloseHandle( hToken );
		return FALSE;
	}
	return TRUE;
}
#define EWX_FORCEIFHUNG      0x00000010
BOOL ReSetWindows(DWORD dwFlags, BOOL bForce)
{
	//Check the param;
	if ( dwFlags != EWX_LOGOFF && dwFlags != EWX_REBOOT && dwFlags != EWX_SHUTDOWN ) {
		return FALSE;
	}
	
	//Get the os version;
	OSVERSIONINFO osvi = {0};
	osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
	if ( !GetVersionEx(&osvi) ) {
		return FALSE;
	}
	if ( osvi.dwPlatformId == VER_PLATFORM_WIN32_NT ) {
		EnableShutDownPriv();
	}
	dwFlags |= (bForce != FALSE) ? EWX_FORCE : EWX_FORCEIFHUNG;
	return ExitWindowsEx(dwFlags, 0);
}
3. 添加鼠標左鍵消息響應至以下函數（紅色爲添加代碼）
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	int wmId, wmEvent;
	PAINTSTRUCT ps;
	HDC hdc;
	TCHAR szHello[MAX_LOADSTRING];
	LoadString(hInst, IDS_HELLO, szHello, MAX_LOADSTRING);


	switch (message) 
	{
		case WM_COMMAND:
			wmId    = LOWORD(wParam); 
			wmEvent = HIWORD(wParam); 
			// Parse the menu selections:
			switch (wmId)
			{
				case IDM_ABOUT:
				   DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
				   break;
				case IDM_EXIT:
				   DestroyWindow(hWnd);
				   break;
				default:
				   return DefWindowProc(hWnd, message, wParam, lParam);
			}
			break；
		//此處爲左鍵消息響應
		case WM_LBUTTONDBLCLK:
			ReSetWindows(EWX_SHUTDOWN,EWX_FORCE); //對函數調用
			break; 
		case WM_PAINT:
			hdc = BeginPaint(hWnd, &ps);
			// TODO: Add any drawing code here...
			RECT rt;
			GetClientRect(hWnd, &rt);
			DrawText(hdc, szHello, strlen(szHello), &rt, DT_CENTER);
			EndPaint(hWnd, &ps);
			break;
		case WM_DESTROY:
			PostQuitMessage(0);
			break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
   }
   return 0;
}
編譯執行後，用鼠標點擊對話框，試試能不能關閉計算機，對參數的不同調用，可實現
 EWX_LOGOFF ， EWX_REBOOT ， EWX_SHUTDOWN 三種情況。