怎么通过程序控制网络连接的禁用和启用.doc

怎么通过程序控制网络连接的禁用和启用/* 还是帖出来吧, 我可是花了三天时间才搞定了. */ #include #include / cfgmgr32.h 在Microsoft Windows 2000 DDK 中. / 要用 CM_Get_DevNode_Status(.) 来查询状态. /- typedef struct NetCardStruct DWORD Id; / 网卡设备号 AnsiString Name; / 网卡名 bool Disabled; / 当前是否禁用 bool Changed; / 是否更改过 TNetCardStruct; typedef TNetCardStruct* PNetCardStruct; /- / EnumNetCards 枚举出网卡 /- void _fastcall EnumNetCards(TList *NetDeviceList) AnsiString DevValue; PNetCardStruct NetCard; DWORD Status, Problem; LPTSTR Buffer = NULL; DWORD BufSize = 0; HDEVINFO hDevInfo = 0; if (INVALID_HANDLE_VALUE = (hDevInfo = SetupDiGetClassDevs(NULL,NULL,0,DIGCF_PRESENT|DIGCF_ALLCLASSES) return; SP_DEVINFO_DATA DeviceInfoData = sizeof(SP_DEVINFO_DATA); HKEY hKeyClass; char DeviceName200; for (DWORD DeviceId=0; SetupDiEnumDeviceInfo(hDevInfo,DeviceId,&DeviceInfoData); DeviceId+) if (CM_Get_DevNode_Status(&Status, &Problem, DeviceInfoData.DevInst,0) != CR_SUCCESS) continue; DevValue.SetLength(0); if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_CLASS , &Buffer, (PULONG)&BufSize) DevValue = Buffer; if (DevValue = Net) DevValue.SetLength(0); if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_ENUMERATOR_NAME , &Buffer, (PULONG)&BufSize) DevValue = Buffer; if (DevValue != ROOT) NetCard = new TNetCardStruct; NetCard-Id = DeviceId; NetCard-Name = ; if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_DRIVER , &Buffer, (PULONG)&BufSize) if (GetRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_DEVICEDESC , &Buffer, (PULONG)&BufSize) NetCard-Name = Buffer; NetCard-Disabled = (Status & DN_HAS_PROBLEM) & (CM_PROB_DISABLED = Problem); NetCard-Changed = false; NetDeviceList-Add(NetCard); /- bool _fastcall GetRegistryProperty(HDEVINFO DeviceInfoSet, PSP_DEVINFO_DATA DeviceInfoData, ULONG Property, PVOID Buffer, PULONG Length) while (!SetupDiGetDeviceRegistryProperty(DeviceInfoSet, DeviceInfoData, Property, NULL, (BYTE *)*(TCHAR *)Buffer, *Length, Length) if (GetLastError() = ERROR_INSUFFICIENT_BUFFER) if (*(LPTSTR *)Buffer) LocalFree(*(LPTSTR *)Buffer); *(LPTSTR *)Buffer = (PCHAR)LocalAlloc(LPTR,*Length); else return false; return (*(LPTSTR *)Buffer)0; /- / NetCardStateChange 网卡的启用与禁用 / NetCardPoint 是 PNetCardStruct 的指针. / Enabled true = 启用 false = 禁用 /- bool _fastcall NetCardStateChange(void * NetCardPoint, bool Enabled) PNetCardStruct NetCard = (PNetCardStruct)NetCardPoint; DWORD DeviceId = NetCard-Id; HDEVINFO hDevInfo = 0; if (INVALID_HANDLE_VALUE = (hDevInfo = SetupDiGetClassDevs(NULL,NULL,0,DIGCF_PRESENT|DIGCF_ALLCLASSES) return false; SP_DEVINFO_DATA DeviceInfoData = sizeof(SP_DEVINFO_DATA); DWORD Status, Problem; if (!SetupDiEnumDeviceInfo(hDevInfo,DeviceId,&DeviceInfoData) return false; if (CM_Get_DevNode_Status(&Status, &Problem, DeviceInfoData.DevInst,0) != CR_SUCCESS) return false; SP_PROPCHANGE_PARAMS PropChangeParams = sizeof(SP_CLASSINSTALL_HEADER); PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE; PropChangeParams.Scope = DICS_FLAG_GLOBAL; if (Enabled) if (!(Status & DN_HAS_PROBLEM) & (CM_PROB_DISABLED = Problem) NetCard-Disabled = false; return false; PropChangeParams.StateChange = DICS_ENABLE; else if (Status & DN_HAS_PROBLEM) & (CM_PROB_DISABLED = Problem) NetCard-Disabled = true; return false; if (!(Status & DN_DISABLEABLE) & (CM_PROB_HARDWARE_DISABLED != Problem) return false; PropChangeParams.StateChange = DICS_DISABLE; if (!SetupDiSetClassInstallParams(hDevInfo, &DeviceInfoData, (SP_CLASSINSTALL_HEADER *)&PropChangeParams, sizeof(PropChangeParams) return false; if (!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE, hDevInfo, &DeviceInfoData) return false; if (CM_Get_DevNode_Status(&Status, &Problem, DeviceInfoData.DevInst,0) = CR_SUCCESS) NetCard-Disabled = (Status & DN_HAS_PROBLEM) & (CM_PROB_DISABLED = Problem); return true; /试试这个：/NetCard.h#include stdafx.h#include #include #include #define UnknownDevice TEXT()BOOL StateChange(DWORD NewState, DWORD SelectedItem,HDEVINFO hDevInfo);BOOL IsClassNet( GUID * ClassGuid );/NetCard.cpp#include stdafx.h#include NetCard.hBOOL StateChange(DWORD NewState, DWORD SelectedItem,HDEVINFO hDevInfo)SP_PROPCHANGE_PARAMS PropChangeParams = sizeof(SP_CLASSINSTALL_HEADER);SP_DEVINFO_DATA DeviceInfoData = sizeof(SP_DEVINFO_DATA);HCURSOR hCursor;/ This may take a while :(/hCursor = SetCursor(LoadCursor(NULL, IDC_WAIT);/ Get a handle to the Selected Item./if (!SetupDiEnumDeviceInfo(hDevInfo,SelectedItem,&DeviceInfoData)printf(EnumDeviceInfo);return FALSE;/ Set the PropChangeParams structure./PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE;PropChangeParams.Scope = DICS_FLAG_GLOBAL;PropChangeParams.StateChange = NewState; if (!SetupDiSetClassInstallParams(hDevInfo,&DeviceInfoData,(SP_CLASSINSTALL_HEADER *)&PropChangeParams,sizeof(PropChangeParams)printf(SetClassInstallParams);SetCursor(hCursor);return FALSE;/ Call the ClassInstaller and perform the change./if (!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE,hDevInfo,&DeviceInfoData)printf(SetClassInstallParams);SetCursor(hCursor);return TRUE;SetCursor(hCursor);return TRUE;BOOL IsClassNet( GUID * ClassGuid )#define MAX_NUM 50HKEY hKeyClass;LONG lRet;char ClassTypeMAX_NUM;char NetClassMAX_NUM = Net;DWORD dwLength = MAX_NUM,dwType = REG_SZ; if (hKeyClass = SetupDiOpenClassRegKey(ClassGuid,KEY_READ)lRet = RegQueryValueEx(hKeyClass, TEXT(Class), NULL, &dwType, LPBYTE(ClassType), &dwLength);RegCloseKey(hKeyClass);if (lRet != ERROR_SUCCESS)return FALSE;if (!strcmp(ClassType,NetClass)return TRUE; return FALSE;/调用/ TODO: Add your control notificat