// 必要的頭文件和要鏈接的LIB文件 #include <setupapi.h> #include <shlwapi.h> #pragma comment(lib, "setupapi.lib") #pragma comment(lib, "shlwapi.lib") // device information set(我把它譯爲設備信息集) HDEVINFO hDevInfo = NULL; // 出錯信息 void FormatMSG(DWORD dwError, LPTSTR * lpszMsg) { BOOL bOk = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER, NULL, dwError, MAKELANGID(LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED), (LPTSTR)lpszMsg, 0, NULL); if (!bOk) { HMODULE hDll = LoadLibraryEx(_T("netmsg.dll"), NULL, DONT_RESOLVE_DLL_REFERENCES); if (NULL != hDll) { FormatMessage(FORMAT_MESSAGE_FROM_HMODULE | FORMAT_MESSAGE_FROM_SYSTEM, hDll, dwError, MAKELANGID(LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED), (LPTSTR)lpszMsg,0, NULL); FreeLibrary(hDll); } } } BOOL ChangeStatus(DWORD NewStatus, DWORD SelectedItem, HDEVINFO hDevInfo) { LPTSTR lpszMsg = NULL; HCURSOR hCursor = NULL; try { SP_PROPCHANGE_PARAMS PropChangeParams = ; SP_DEVINFO_DATA DeviceInfoData = ; hCursor = SetCursor(LoadCursor(NULL, IDC_WAIT)); // Get a handle to the Selected Item. if (!SetupDiEnumDeviceInfo(hDevInfo, SelectedItem, &DeviceInfoData)) { FormatMSG(GetLastError(), &lpszMsg); throw lpszMsg; } // Set the PropChangeParams structure. PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE; PropChangeParams.Scope = DICS_FLAG_GLOBAL; PropChangeParams.StateChange = NewStatus; if (!SetupDiSetClassInstallParams(hDevInfo, &DeviceInfoData, (SP_CLASSINSTALL_HEADER *)&PropChangeParams, sizeof(PropChangeParams))) { FormatMSG(GetLastError(), &lpszMsg); throw lpszMsg; } // Call the ClassInstaller and perform the change. if (!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE,hDevInfo,&DeviceInfoData)) { FormatMSG(GetLastError(), &lpszMsg); throw lpszMsg; } SetCursor(hCursor); return TRUE; } catch (TCHAR * pszError) { SetCursor(hCursor); ::MessageBox(NULL,pszError,_T("提示"),MB_OK); if (NULL != lpszMsg) return FALSE; } } // 這些設備的啓用和禁用主要有此函數實現 // 參數說明,nStatus 可取3個值,-1 :啥也不做 // 0 禁用設備,1啓用設備。 // nIndex用於控制是對光驅,軟驅還是對USB啓用或禁用 // 也是可取3個值,0 代表軟驅,1 代表光驅 // 2 代表USB // 譬如要對光驅實現禁用,可以這樣調用此函數 // ControlDisk(0, 1); BOOL ControlDisk(int nStatus, int nIndex) { if (-1 == nStatus) { return FALSE; } LPTSTR lpszMsg = NULL; try { TCHAR * GUIDString = NULL; GUID guid; ZeroMemory(&guid, sizeof(GUID)); switch(nIndex) { case 0: // 0 代表軟驅 GUIDString = _T("4D36E980-E325-11CE-BFC1-08002BE10318"); UuidFromString((unsigned char *)GUIDString, &guid); break; case 1: // 1 代表光驅 GUIDString = _T("4D36E965-E325-11CE-BFC1-08002BE10318"); UuidFromString((unsigned char *)GUIDString, &guid); break; case 2: // 2 代表USB GUIDString = _T("36FC9E60-C465-11CF-8056-444553540000"); UuidFromString((unsigned char *)GUIDString, &guid); break; } hDevInfo = SetupDiGetClassDevs(&guid,NULL,NULL,DIGCF_PRESENT); if (INVALID_HANDLE_VALUE == hDevInfo) { FormatMSG(GetLastError(), &lpszMsg); throw lpszMsg; } DWORD i; SP_DEVINFO_DATA DeviceInfoData; ZeroMemory(&DeviceInfoData, sizeof(SP_DEVINFO_DATA)); DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA); for (i = 0; SetupDiEnumDeviceInfo(hDevInfo, i, &DeviceInfoData); ++i) { if (1 == nStatus) { StateChange(DICS_ENABLE, i, hDevInfo); } else if (0 == nStatus) { StateChange(DICS_DISABLE, i, hDevInfo); } } // 釋放 device information set return SetupDiDestroyDeviceInfoList(hDevInfo); } catch (TCHAR * pszError) { ::MessageBox(NULL,pszError,_T("提示"),MB_OK); if (NULL != lpszMsg) return FALSE; } return FALSE; } |
經測試這樣對光驅,軟驅和USB實現禁用沒有問題,但是當禁用過之後如果要對USB實現啓用必須兩次調用ControlDisk(1, 2);這個函數纔可,其餘的兩個啓用沒什麼問題。還有要說的就是我不是用的枚舉所有的設備,然後再過濾(網上的那個禁用網卡的就是這種方法)。
據我觀察,在註冊表的此項下下:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlClass |
有很多GUID,每個GUID代表一個設備,譬如這個是USB的
這個是CDROM的
等等了。
這些值你即使把它改爲別的GUID,我使用原來的GUID仍然可以實現我的功能。