VC编程禁用和启用网卡

#include "StdAfx.h" #include "NetCardCtrl.h" NetCardCtrl::NetCardCtrl(void) { } NetCardCtrl::~NetCardCtrl(void) { } //参数： bool bStatus // true： 禁用网络 // false： 启用网络 BOOL NetCardCtrl::DisableNetCard( BOOL bStatus ) { IN LPTSTR NetCardClassGuidID ; NetCardClassGuidID= _T("{4D36E972-E325-11CE-BFC1-08002BE10318}"); DWORD NewState ; if(bStatus) { NewState=DICS_DISABLE ; } else { NewState=DICS_ENABLE ; } DWORD i = 0; BOOL Found = FALSE ; HDEVINFO hDevInfo ; SP_DEVINFO_DATA spDevInfoData ; //访问系统的硬件库 hDevInfo=SetupDiGetClassDevs(NULL,_T("PCI"),NULL,DIGCF_ALLCLASSES|DIGCF_PRESENT); if(hDevInfo==INVALID_HANDLE_VALUE) { MessageBox(NULL,_T("访问系统硬件出错！"),_T(""),0); return FALSE ; } //枚举硬件，获得需要的接口 spDevInfoData.cbSize=sizeof(SP_DEVINFO_DATA); for(i=0;SetupDiEnumDeviceInfo(hDevInfo,i,&spDevInfoData);i++) { DWORD DataT ; LPTSTR p,buffer=NULL ; DWORD buffersize=0 ; while(!SetupDiGetDeviceRegistryProperty(hDevInfo,&spDevInfoData,SPDRP_CLASSGUID,&DataT, (PBYTE)buffer,buffersize,&buffersize)) { if(GetLastError()==ERROR_INVALID_DATA) { break ; } else if(GetLastError()==ERROR_INSUFFICIENT_BUFFER) { if(buffer) LocalFree(buffer); buffer=(LPTSTR)LocalAlloc(LPTR,buffersize); } else { SetupDiDestroyDeviceInfoList(hDevInfo); return FALSE ; } } if(GetLastError()==ERROR_INVALID_DATA) continue ; for(p=buffer;*p&&(p<&buffer[buffersize]);p+=lstrlen(p)+sizeof(TCHAR)) { if(!_tcscmp(NetCardClassGuidID,p)) { //找到网卡 Found=TRUE ; break ; } } if(buffer) LocalFree(buffer); if(Found) { SP_PROPCHANGE_PARAMS spPropChangeParams ; spPropChangeParams.ClassInstallHeader.cbSize=sizeof(SP_CLASSINSTALL_HEADER); spPropChangeParams.ClassInstallHeader.InstallFunction=DIF_PROPERTYCHANGE ; spPropChangeParams.Scope=DICS_FLAG_GLOBAL ; spPropChangeParams.StateChange=NewState ; // if(!SetupDiSetClassInstallParams(hDevInfo,&spDevInfoData,(SP_CLASSINSTALL_HEADER*)&spPropChangeParams,sizeof(spPropChangeParams))) { DWORD errorcode=GetLastError(); } if(!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE,hDevInfo,&spDevInfoData)) { DWORD errorcode=GetLastError(); } switch(NewState) { case DICS_DISABLE : MessageBox(NULL,_T("成功禁用网络！"),_T(""),0); break ; case DICS_ENABLE : MessageBox(NULL,_T("成功启用网络！"),_T(""),0); break ; } break ; } } SetupDiDestroyDeviceInfoList(hDevInfo); return TRUE ; }