BCB编写禁用网卡和启用网卡设备 SP_PROPCHANGE_PARAMS params = {sizeof(SP_CLASSINSTALL_HEADER )}; params.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE; params.Scope = DICS_FLAG_CONFIGSPECIFIC; params.StateChange = DICS_DISABLE; //½ûÓãºDICS_DISABLE£¬DICS_ENABLEÆôÓà params.HwProfile = 0; SetupDiSetClassInstallParams(hDevInfo, &DeviceInfoData, (SP_CLASSINSTALL_HEADER*)&pa rams, sizeof(SP_PROPCHANGE_PARAMS)); SetupDiChangeState(hDevInfo, &DeviceInfoData); rams, sizeof(SP_PROPCHANGE_PARAMS)); SetupDiChangeState(hDevInfo, &DeviceInfoData);