Win10下在桌面上绘制时钟，获取CPU，内存及笔记本电池状态。

 #include "CDeskTimeWnd.h" struct WNDMSG { UINT uMsg; long (CDeskTimeWnd::*pFn)(WPARAM wParam, LPARAM lParam); }; WNDMSG CDeskTimeWnd::m_wndMsg[]={ //Add Message map {WM_CREATE,&CDeskTimeWnd::OnCreate}, {WM_DESTROY,&CDeskTimeWnd::OnDestory}, {WM_TIMER,&CDeskTimeWnd::OnTimer}, {WM_NCDESTROY,&CDeskTimeWnd::OnNcDestroy}, {WM_POWERBROADCAST,&CDeskTimeWnd::OnPowerBroadcast}, }; CDeskTimeWnd* CDeskTimeWnd::m_pThis = NULL; CDeskTimeWnd::CDeskTimeWnd() { this->m_hInstance = NULL; this->m_hWnd = NULL; this->m_pThis = this; m_szClassName = TEXT("DeskTimeWnd"); hPowerSource = NULL; hPercentageRemain = NULL; m_bThreadRun = FALSE; //获取屏幕尺寸 m_nScreenWidth = GetSystemMetrics(SM_CXSCREEN); m_nScreenHeight = GetSystemMetrics(SM_CYSCREEN); //Clock m_nClockRadius = m_nScreenHeight / 3; //表盘半径 OriginPoint.X = m_nClockRadius + 20; OriginPoint.Y = m_nClockRadius + 20; //charge m_nSmallCircleRadius = m_nScreenHeight / 8; OriginChargePoint.X = m_nSmallCircleRadius; OriginChargePoint.Y = m_nSmallCircleRadius; m_ChargeSize.cx = 190; m_ChargeSize.cy = 80; m_szSignature = TEXT("竹林听雨"); m_birthday = CTime(2016, 1, 16, 12, 57, 00); m_Blend.BlendOp = 0; //theonlyBlendOpdefinedinWindows2000--blend opration m_Blend.BlendFlags = 0; //nothingelseisspecial...must be zero m_Blend.AlphaFormat = 1; //... m_Blend.SourceConstantAlpha = 180;//AC_SRC_ALPHA } CDeskTimeWnd::~CDeskTimeWnd() { } /* * 格式化GetLastError() */ CString CDeskTimeWnd::szFormatMessage(DWORD dwErrorCode) { CString szvar; LPVOID lpv; FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, \ NULL, \ dwErrorCode, \ MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), \ (LPTSTR)&lpv, \ 0, \ NULL); if (lpv) { szvar = (LPCTSTR)lpv; HeapFree((HANDLE)GetProcessHeap(), HEAP_NO_SERIALIZE, lpv); } return szvar; } /* * 查找桌面的句柄 */ HWND CDeskTimeWnd::FindDesktopHandle() { HWND hWorkerW = NULL, hDefView = NULL; HWND hDesktop = NULL; // hDesktop = GetDesktopWindow(); // hWorkerWChild = GetAncestor(hDesktop,GA_PARENT); // hWorkerW = GetParent(hWorkerWChild); hWorkerW = ::FindWindow(TEXT("Progman"), NULL); hDefView = ::FindWindowEx(hWorkerW, NULL, L"SHELLDLL_DefView", NULL); if (hDefView != NULL) return hWorkerW; do { hWorkerW = ::FindWindowEx(NULL, hWorkerW, L"WorkerW", NULL); hDefView = ::FindWindowEx(hWorkerW, NULL, L"SHELLDLL_DefView", NULL); } while ((hWorkerW == NULL) ||(hDefView == NULL)); hWorkerW = ::FindWindowEx(NULL, hWorkerW, L"WorkerW", NULL); hDesktop = ::FindWindowEx(hDefView, NULL, L"SysListView32", L"FolderView"); return hWorkerW; // int Nm = ListView_GetItemCount(hDesktop); // for (int i = 0; i < Nm; i++) // { // int x = 400 + 150 * cos(i * 36 * 3.1415926 / 180); // int y = 400 + 150 * sin(i * 36 * 3.1415926 / 180); // // ::SendMessage(hDesktop, LVM_SETITEMPOSITION, i, MAKELPARAM(x, y)); // } // ListView_RedrawItems(hDesktop, 0, ListView_GetItemCount(hDesktop) - 1); // ::UpdateWindow(hDesktop); } /* * 初始化窗口 */ UINT CDeskTimeWnd::InitApp(HINSTANCE hInst, int nShowCmd /* = SW_SHOWNORMAL */) { this->m_hInstance = hInst; Gdiplus::GdiplusStartupInput m_Gdiplusstartup; ULONG_PTR m_Gdiplustoken; //启动GDI+ GdiplusStartup(&m_Gdiplustoken, &m_Gdiplusstartup, NULL); CreateWnd(hInst, nShowCmd); MSG msg; while (::GetMessage(&msg, NULL, 0, 0)) { ::TranslateMessage(&msg); ::DispatchMessage(&msg); } //关闭gdiplus的环境 GdiplusShutdown(m_Gdiplustoken); return (UINT)msg.wParam; } /* * 创建窗口 */ void CDeskTimeWnd::CreateWnd(HINSTANCE hInst, int nShowCmd) { m_hWndParent = FindDesktopHandle(); HWND hwnd; WNDCLASSEX wndClass = { 0 }; //注册窗口类 wndClass.cbSize = sizeof(WNDCLASSEX); wndClass.style = CS_NOCLOSE; wndClass.lpfnWndProc = (WNDPROC)WinProc; wndClass.cbClsExtra = 0; wndClass.cbWndExtra = 0; wndClass.hInstance = hInst; wndClass.hIcon = NULL; wndClass.hCursor = LoadCursor(NULL, IDC_ARROW); wndClass.hbrBackground = (HBRUSH)GetSysColor(TRANSPARENT)/*(HBRUSH)(COLOR_WINDOW + 1)*/; wndClass.lpszMenuName = NULL; wndClass.lpszClassName = m_szClassName; wndClass.hIconSm = NULL; if (!::RegisterClassEx(&wndClass)) { #ifdef DEBUG OutputDebugString(szFormatMessage(GetLastError())); #endif // DEBUG return; } hwnd = CreateWindowEx(WS_EX_TRANSPARENT | WS_EX_LAYERED /*| WS_EX_TOOLWINDOW | WS_EX_NOPARENTNOTIFY*/ | WS_EX_NOACTIVATE, m_szClassName, NULL, ~(WS_BORDER | WS_VSCROLL | WS_HSCROLL | WS_OVERLAPPEDWINDOW | WS_CAPTION) | WS_CHILD| WS_DISABLED, 0, 0, m_nScreenWidth, m_nScreenHeight, NULL, NULL, hInst, NULL); if (!hwnd) { #ifdef DEBUG OutputDebugString(szFormatMessage(GetLastError())); #endif // DEBUG return; } ::ShowWindow(hwnd,nShowCmd); ::UpdateWindow(hwnd); } /* * Window process function */ LRESULT CALLBACK CDeskTimeWnd::WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { m_pThis->m_hWnd = hWnd; for (int i = 0; i < sizeof(m_wndMsg) / sizeof(m_wndMsg[0]); i++) { if (uMsg == m_wndMsg[i].uMsg) { return (m_pThis->*(m_wndMsg[i].pFn))(wParam, lParam); } } #ifdef DEBUG CString szInfo; szInfo.Format(TEXT("\r\nMSG:%x--WPARAM:%x--LPARAM:%x"), uMsg, wParam, lParam); OutputDebugString(szInfo); #endif // DEBUG return ::DefWindowProc(hWnd, uMsg, wParam, lParam); } /************************************************************************/ /* MESSAGE */ /************************************************************************/ long CDeskTimeWnd::OnCreate(WPARAM wParam, LPARAM lParam) { HINSTANCE m_hUser32Instance = LoadLibrary(L"User32.dll"); if (!m_hUser32Instance) exit(0); SetParent(m_hWnd, m_hWndParent); InitGlobalParam(); return 0; } long CDeskTimeWnd::OnDestory(WPARAM wParam, LPARAM lParam) { DeleteDC(m_hdcMemoryClockLayer); m_hdcMemoryClockLayer = NULL; if(hPowerSource !=NULL) { UnregisterPowerSettingNotification(hPowerSource); hPowerSource = NULL; } if (hPercentageRemain != NULL) { UnregisterPowerSettingNotification(hPercentageRemain); hPercentageRemain = NULL; } KillTimer(m_hWnd, _Timer_Num); PostQuitMessage(0); return 0; } long CDeskTimeWnd::OnNcDestroy(WPARAM wParam, LPARAM lParam) { return OnDestory(wParam, lParam); } long CDeskTimeWnd::OnPowerBroadcast(WPARAM wParam, LPARAM lParam) { POWERBROADCAST_SETTING* ppbs = (POWERBROADCAST_SETTING*)lParam; if (wParam == PBT_POWERSETTINGCHANGE) { if (memcmp(&ppbs->PowerSetting, &GUID_ACDC_POWER_SOURCE, sizeof(GUID)) == 0) { m_nPowerSource = *ppbs->Data; } if (memcmp(&ppbs->PowerSetting, &GUID_BATTERY_PERCENTAGE_REMAINING, sizeof(GUID)) == 0) { m_nPowerPercentage = *ppbs->Data; } UpdateBatteryLayer(); } return 0; } long CDeskTimeWnd::OnTimer(WPARAM wParam, LPARAM lParam) { DWORD dwCount = 0; CTime time = CTime::GetCurrentTime(); CString szInfo; if(wParam==_Timer_Num) { if(m_bThreadRun) { dwCount = SuspendThread(m_hUpdateDisplayThread); m_bThreadRun = FALSE; } if ((m_nDisplayDay != time.GetDay())) UpdateCalendarLayer(time); UpdateClockLayer(time.GetHour(),time.GetMinute(),time.GetSecond()); UpdateCPULayer(); UpdateMemoryLayer(); if (!m_bThreadRun) { dwCount = ResumeThread(m_hUpdateDisplayThread); m_bThre