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日期:2011-03-22 13:54:00  来源:本站整理

禁用设备[VC/C++编程]

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参考

Device Management Functions

// 必要的头文件和要链接的LIB文件
#include <setupapi.h>
#include <shlwapi.h>
#pragma comment(lib, "setupapi.lib")
#pragma comment(lib, "shlwapi.lib") // device information set(我把它译为设备信息集)
HDEVINFO hDevInfo = NULL;// 出错信息
void FormatMSG(DWORD dwError, LPTSTR * lpszMsg)
{
  BOOL bOk = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER,
   NULL, dwError,
   MAKELANGID(LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED), (LPTSTR) lpszMsg, 0, NULL);
  if (!bOk)
  {
    HMODULE hDll = LoadLibraryEx(_T("netmsg.dll"), NULL, DONT_RESOLVE_DLL_REFERENCES);
    if (NULL != hDll)
    {
      FormatMessage(FORMAT_MESSAGE_FROM_HMODULE | FORMAT_MESSAGE_FROM_SYSTEM,
       hDll, dwError,
       MAKELANGID(LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED), (LPTSTR)lpszMsg,0, NULL);
      FreeLibrary(hDll);
    }
  }
}
<!--[if !supportEmptyParas]--><!--[endif]-->
BOOL ChangeStatus(DWORD NewStatus, DWORD SelectedItem, HDEVINFO hDevInfo)
{
  LPTSTR lpszMsg = NULL; HCURSOR hCursor = NULL;
  try
  {
    SP_PROPCHANGE_PARAMS PropChangeParams = {sizeof (SP_CLASSINSTALL_HEADER)};
    SP_DEVINFO_DATA DeviceInfoData = {sizeof(SP_DEVINFO_DATA)};
    hCursor = SetCursor(LoadCursor(NULL, IDC_WAIT));   //Get a handle to the Selected Item.
    if (!SetupDiEnumDeviceInfo(hDevInfo, SelectedItem, &DeviceInfoData))
    {
      FormatMSG(GetLastError(), &lpszMsg);
      throw lpszMsg;
    }  //Set the PropChangeParams structure.
    PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE;
    PropChangeParams.Scope = DICS_FLAG_GLOBAL;
    PropChangeParams.StateChange = NewStatus;
    if (!SetupDiSetClassInstallParams(hDevInfo, &DeviceInfoData,
       (SP_CLASSINSTALL_HEADER *)&PropChangeParams,sizeof (PropChangeParams)))
    {
      FormatMSG(GetLastError(), &lpszMsg);
      throw lpszMsg;
    }  //Call the ClassInstaller and perform the change.
    if (!SetupDiCallClassInstaller (DIF_PROPERTYCHANGE,hDevInfo,&DeviceInfoData))
    {
      FormatMSG(GetLastError(), &lpszMsg);
      throw lpszMsg;
    }
    SetCursor(hCursor);
    return TRUE;
  }
  catch (TCHAR * pszError)
  {
    SetCursor(hCursor);
    ::MessageBox(NULL,pszError,_T("提醒"),MB_OK);
    if (NULL != lpszMsg)
    {
      LocalFree((HLOCAL)lpszMsg);
    }
    return FALSE;
  }
}
// 这些设备的启用和禁用主要有此函数实现
// 参数阐明,nStatus 可取3个值,-1 :啥也不做// 0 禁用设备,1启用设备.
// nIndex用于掌握是对光驱,软驱还是对USB启用或禁用
// 也是可取3个值,0 代表软驱,1 代表光驱 2 代表USB
// 比方要对光驱实现禁用,可以这样调用此函数
// ControlDisk(0, 1);
bool ControlDisk(int nStatus, int nIndex)
{
  if (-1 == nStatus)
  {
    return FALSE;
  }
  LPTSTR lpszMsg = NULL;
  try
  {
    TCHAR * GUIDString = NULL;
    GUID guid;
    ZeroMemory(&guid, sizeof(GUID));
    switch(nIndex)
    {
    case 0: // 0 代表软驱
      GUIDString = _T("4D36E980-E325-11CE-BFC1- 08002BE10318");
      UuidFromString((unsigned char *)GUIDString, &guid);
      break;
    case 1: // 1 代表光驱
      GUIDString = _T("4D36E965-E325-11CE-BFC1- 08002BE10318");
      UuidFromString((unsigned char *)GUIDString, &guid);
      break;
    case 2: // 2 代表USB
      GUIDString = _T("36FC9E60-C465-11CF-8056- 444553540000");
      UuidFromString((unsigned char *)GUIDString, &guid);
      break;
    default:;
    }
    hDevInfo = SetupDiGetClassDevs (&guid,NULL,NULL,DIGCF_PRESENT);
    if (INVALID_HANDLE_VALUE == hDevInfo)
    {
      FormatMSG(GetLastError(), &lpszMsg);
      throw lpszMsg;
    }
    DWORD i;
    SP_DEVINFO_DATA DeviceInfoData;
    ZeroMemory(&DeviceInfoData, sizeof(SP_DEVINFO_DATA));
    DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
    for (i = 0; SetupDiEnumDeviceInfo(hDevInfo, i, &DeviceInfoData); ++i)
    {
      if (1 == nStatus)
      {
        StateChange(DICS_ENABLE, i, hDevInfo);
      }
      else if (0 == nStatus)
      {
        StateChange(DICS_DISABLE, i, hDevInfo);
      }
    }  // 释放 device information set
    return SetupDiDestroyDeviceInfoList(hDevInfo);
  }
  catch (TCHAR * pszError)
  {
    ::MessageBox(NULL,pszError,_T("提醒"),MB_OK);
    if (NULL != lpszMsg)
    {
      LocalFree((HLOCAL)lpszMsg);
    }
    return FALSE;
  }
  return FALSE;
}


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