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<DIV class="left fontsize2">VC实现光驱、软驱、USB的禁用和启用</DIV>
<DIV class=fontclear></DIV><BR>
<DIV class=left><SPAN class=span>作者:dlutyuanhongl</SPAN><SPAN 
class=span>出处:vckbase</SPAN><SPAN class=span>责任编辑:<A title=向本编辑提问 
href="http://comments.yesky.com/t/·&frac12;&Ouml;&Ucirc;/6,324/1922656.shtml"> 方舟 </A></SPAN><SPAN 
class=span>[ 2005-03-16 09:54 ]</SPAN></DIV>
<DIV class=fontclear></DIV>
<DIV class="left fontsize3">由于工作的实际需要,需要对光驱,软驱,USB的启用和禁用实现控制</DIV>
<DIV class=fontclear></DIV>
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<DIV class=guanggao><SPAN id=ad3></SPAN></DIV>
<DIV class=guanggao><SPAN 
id=contentAdv></SPAN></DIV>  由于工作的实际需要,需要对光驱,软驱,USB的启用和禁用实现控制。参考大家提供的对网卡禁用的代码,实现了光驱,软驱,USB的启用和禁用。主要实现代码如下:<BR><BR>
<TABLE borderColor=#ffcc66 width="90%" align=center bgColor=#dadacf border=1>
  <TBODY>
  <TR>
    <TD>// 必要的头文件和要链接的LIB文件<BR>#include &lt;setupapi.h&gt;<BR>#include 
      &lt;shlwapi.h&gt;<BR>#pragma comment(lib, "setupapi.lib")<BR>#pragma 
      comment(lib, "shlwapi.lib") <BR>// <A class=bluekey 
      href="http://www.yesky.com/key/2942/167942.html" target=_blank>device</A> 
      <A class=bluekey href="http://www.yesky.com/key/2998/167998.html" 
      target=_blank>information</A> set(我把它译为设备信息集)<BR>HDEVINFO hDevInfo = 
      NULL;<BR><BR>// 出错信息<BR>void FormatMSG(DWORD dwError, LPTSTR * 
      lpszMsg)<BR>{ <BR> BOOL bOk = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | 
      FORMAT_MESSAGE_ALLOCATE_BUFFER, NULL, 
      dwError,<BR>    MAKELANGID(LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED), 
      (LPTSTR)lpszMsg, 0, NULL);<BR><BR> if (!bOk)<BR> {<BR>  HMODULE hDll = 
      LoadLibraryEx(_T("netmsg.dll"),<BR>     NULL,<BR>     DONT_RESOLVE_DLL_REFERENCES);<BR>  if 
      (NULL != hDll)<BR>  {<BR>    FormatMessage(FORMAT_MESSAGE_FROM_HMODULE | 
      <BR>        FORMAT_MESSAGE_FROM_SYSTEM,<BR>        hDll,<BR>        dwError,<BR>        MAKELANGID(LANG_CHINESE, 
      SUBLANG_CHINESE_SIMPLIFIED),<BR>        (LPTSTR)lpszMsg,0, 
      NULL);<BR>    FreeLibrary(hDll);<BR>  }<BR> }<BR>}<BR><BR>BOOL 
      ChangeStatus(DWORD NewStatus, DWORD SelectedItem, HDEVINFO 
      hDevInfo)<BR>{<BR> LPTSTR lpszMsg = NULL;<BR> HCURSOR hCursor = 
      NULL;<BR> try<BR> {<BR>  SP_PROPCHANGE_PARAMS PropChangeParams = 
      {sizeof(SP_CLASSINSTALL_HEADER)};<BR>  SP_DEVINFO_DATA DeviceInfoData = 
      {sizeof(SP_DEVINFO_DATA)}; <BR><BR>  hCursor = SetCursor(LoadCursor(NULL, 
      IDC_WAIT));<BR><BR>  // Get a handle to the Selected Item.<BR>  if 
      (!SetupDiEnumDeviceInfo(hDevInfo, SelectedItem, 
      &amp;DeviceInfoData))<BR>  {<BR>   FormatMSG(GetLastError(), 
      &amp;lpszMsg);<BR>   throw lpszMsg;<BR>  }<BR><BR>  // Set the 
      PropChangeParams 
      structure.<BR>  PropChangeParams.ClassInstallHeader.InstallFunction = 
      DIF_PROPERTYCHANGE;<BR>  PropChangeParams.Scope = 
      DICS_FLAG_GLOBAL;<BR>  PropChangeParams.StateChange = 
      NewStatus;<BR><BR>  if (!SetupDiSetClassInstallParams(hDevInfo, 
      &amp;DeviceInfoData, (SP_CLASSINSTALL_HEADER 
      *)&amp;PropChangeParams,<BR>sizeof(PropChangeParams)))<BR>  {<BR>   FormatMSG(GetLastError(), 
      &amp;lpszMsg);<BR>   throw lpszMsg;<BR>  }<BR><BR>  // <A class=bluekey 
      href="http://www.yesky.com/key/4884/159884.html" target=_blank>Call</A> 
      the ClassInstaller and perform the change.<BR>  if 
      (!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE,hDevInfo,&amp;DeviceInfoData))<BR>  {<BR>   FormatMSG(GetLastError(), 
      &amp;lpszMsg);<BR>   throw lpszMsg;<BR>  }<BR><BR>  SetCursor(hCursor); 
      <BR>  return TRUE;<BR> }<BR> catch (TCHAR * 
      pszError)<BR> {<BR>  SetCursor(hCursor);<BR>  ::MessageBox(NULL,pszError,_T("提示"),MB_OK);<BR>  if 
      (NULL != lpszMsg)<BR>  {<BR>   LocalFree((HLOCAL)lpszMsg);<BR>  } 
      <BR>  return FALSE;<BR> } <BR>}<BR><BR>// 这些设备的启用和禁用主要有此函数实现<BR>// 
      参数说明,nStatus 可取3个值,-1 :啥也不做<BR>// 0 禁用设备,1启用设备。<BR>// 
      nIndex用于控制是对光驱,软驱还是对USB启用或禁用<BR>// 也是可取3个值,0 代表软驱,1 代表光驱<BR>// 2 
      代表USB<BR>// 譬如要对光驱实现禁用,可以这样调用此函数<BR>// ControlDisk(0, 1);<BR>BOOL 
      ControlDisk(int nStatus, int nIndex)<BR>{<BR> if (-1 == 
      nStatus)<BR> { <BR>  return FALSE;<BR> } <BR><BR> LPTSTR lpszMsg = 
      NULL;<BR> try<BR> {<BR>  TCHAR * GUIDString = NULL;<BR>  GUID 
      guid;<BR>  ZeroMemory(&amp;guid, 
      sizeof(GUID));<BR>  switch(nIndex)<BR>  {<BR>   case 0: // 0 
      代表软驱<BR>    GUIDString = 
      _T("4D36E980-E325-11CE-BFC1-08002BE10318");<BR>    UuidFromString((unsigned 
      char *)GUIDString, &amp;guid);<BR>    break; <BR>   case 1: // 1 代表光驱 
      <BR>    GUIDString = 
      _T("4D36E965-E325-11CE-BFC1-08002BE10318");<BR>    UuidFromString((unsigned 
      char *)GUIDString, &amp;guid);<BR>    break;<BR>   case 2: // 2 
      代表USB<BR>    GUIDString = 
      _T("36FC9E60-C465-11CF-8056-444553540000");<BR>    UuidFromString((unsigned 
      char *)GUIDString, &amp;guid);<BR>    break;<BR>  }<BR><BR>  hDevInfo = 
      SetupDiGetClassDevs(&amp;guid,NULL,NULL,DIGCF_PRESENT);<BR>  if 
      (INVALID_HANDLE_VALUE == hDevInfo)<BR>  {<BR>   FormatMSG(GetLastError(), 
      &amp;lpszMsg);<BR>   throw lpszMsg;<BR>  }<BR><BR>  DWORD 
      i;<BR>  SP_DEVINFO_DATA 
      DeviceInfoData;<BR>  ZeroMemory(&amp;DeviceInfoData, 
      sizeof(SP_DEVINFO_DATA));<BR>  DeviceInfoData.cbSize = 
      sizeof(SP_DEVINFO_DATA);<BR><BR>  for (i = 0; 
      SetupDiEnumDeviceInfo(hDevInfo, <A class=bluekey 
      href="http://www.yesky.com/key/497/160497.html" target=_blank>i,</A> 
      &amp;DeviceInfoData); ++i)<BR>  {<BR>   if (1 == 
      nStatus)<BR>   {<BR>    StateChange(DICS_ENABLE, i, 
      hDevInfo);<BR>   }<BR>   else if (0 == 
      nStatus)<BR>   {<BR>    StateChange(DICS_DISABLE, i, hDevInfo);<BR>   } 
      <BR>  }<BR><BR>  // 释放 device information set<BR>  return 
      SetupDiDestroyDeviceInfoList(hDevInfo);<BR> }<BR> catch (TCHAR * 
      pszError)<BR> {<BR>  ::MessageBox(NULL,pszError,_T("提示"),MB_OK);<BR>  if 
      (NULL != lpszMsg)<BR>  {<BR>   LocalFree((HLOCAL)lpszMsg);<BR>  } 
      <BR>  return FALSE;<BR> }<BR> return 
FALSE;<BR>}</TD></TR></TBODY></TABLE><BR>  经测试这样对光驱,软驱和USB实现禁用没有问题,但是当禁用过之后如果要对USB实现启用必须两次调用ControlDisk(1, 
2);这个函数才可,其余的两个启用没什么问题。还有要说的就是我不是用的枚举所有的设备,然后再过滤(网上的那个禁用网卡的就是这种方法)。<BR><BR>  据我观察,在注册表的此项下下:<BR><BR>
<TABLE borderColor=#ffcc66 width="90%" align=center bgColor=#dadacf border=1>
  <TBODY>
  <TR>
    <TD>HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\</TD></TR></TBODY></TABLE><BR>  有很多GUID,每个GUID代表一个设备,譬如这个是USB的<BR><BR>
<TABLE borderColor=#ffcc66 width="90%" align=center bgColor=#dadacf border=1>
  <TBODY>
  <TR>
    <TD>{36FC9E60-C465-11CF-8056-444553540000}</TD></TR></TBODY></TABLE><BR>  这个是<A 
class=bluekey href="http://www.yesky.com/key/2081/152081.html" 
target=_blank>CDROM</A>的<BR><BR>
<TABLE borderColor=#ffcc66 width="90%" align=center bgColor=#dadacf border=1>
  <TBODY>
  <TR>
    <TD>{4D36E965-E325-11CE-BFC1-08002BE10318}</TD></TR></TBODY></TABLE><BR>  等等了。<BR><BR>  这些值你即使把它改为别的GUID,我使用原来的GUID仍然可以实现我的功能。 
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