Windows下控制USB设备启动代码实现

1.#include <WINDOWS.H>    
 2.#include <TCHAR.H>    
 3.#include <SETUPAPI.H>    
 4.//#include <SHLWAPI.H>    
 5.#pragma comment(lib, "setupapi.lib")    
 6.//#pragma comment(lib, "shlwapi.lib")    
 7.HDEVINFO hDevInfo = NULL;   
 8.// 出错信息    
 9.void FormatMSG(DWORD dwError, LPTSTR * o)   
 10.{   
 11.    LPTSTR oo=(LPTSTR)o;   
 12.    BOOL bOk = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER, NULL, dwError,   
 13.        MAKELANGID(LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED), oo, 0, NULL);   
 14.  if(!bOk)                                                  //将**变成*2007 /01 /10    
 15.  {                                                         //新建的字符串由oo指向。    
 16.      HMODULE hDll = LoadLibraryEx(_T("netmsg.dll"),NULL,DONT_RESOLVE_DLL_REFERENCES);   
 17.      if(NULL != hDll)   
 18.      {   
 19.        FormatMessage(FORMAT_MESSAGE_FROM_HMODULE |    
 20.        FORMAT_MESSAGE_FROM_SYSTEM,hDll,   
 21.        dwError,   
 22.        MAKELANGID(LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED),   
 23.        (LPTSTR)o,0, NULL);   
 24.        FreeLibrary(hDll);   
 25.      }   
 26.  }   
 27.}   
 28.BOOL ChangeStatus(DWORD NewStatus, DWORD SelectedItem, HDEVINFO hDevInfo)   
 29.{   
 30.    LPTSTR lpszMsg = NULL;