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Feature issue 148
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| Original file line number | Diff line number | Diff line change |
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| /****************************** Module Header ******************************\ | ||
| Module Name: Reg.cpp | ||
| Project: CppShellExtContextMenuHandler | ||
| Copyright (c) Microsoft Corporation. | ||
| The file implements the reusable helper functions to register and unregister | ||
| in-process COM components and shell context menu handlers in the registry. | ||
| RegisterInprocServer - register the in-process component in the registry. | ||
| UnregisterInprocServer - unregister the in-process component in the registry. | ||
| RegisterShellExtContextMenuHandler - register the context menu handler. | ||
| UnregisterShellExtContextMenuHandler - unregister the context menu handler. | ||
| This source is subject to the Microsoft Public License. | ||
| See http://www.microsoft.com/opensource/licenses.mspx#Ms-PL. | ||
| All other rights reserved. | ||
| THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, | ||
| EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED | ||
| WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE. | ||
| \***************************************************************************/ | ||
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| #include "Reg.h" | ||
| #include <strsafe.h> | ||
| #include <Shlwapi.h> | ||
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| #pragma region Registry Helper Functions | ||
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| // | ||
| // FUNCTION: SetHKCRRegistryKeyAndValue | ||
| // | ||
| // PURPOSE: The function creates a HKCR registry key and sets the specified | ||
| // registry value. | ||
| // | ||
| // PARAMETERS: | ||
| // * pszSubKey - specifies the registry key under HKCR. If the key does not | ||
| // exist, the function will create the registry key. | ||
| // * pszValueName - specifies the registry value to be set. If pszValueName | ||
| // is NULL, the function will set the default value. | ||
| // * pszData - specifies the string data of the registry value. | ||
| // | ||
| // RETURN VALUE: | ||
| // If the function succeeds, it returns S_OK. Otherwise, it returns an | ||
| // HRESULT error code. | ||
| // | ||
| HRESULT SetHKCRRegistryKeyAndValue(PCWSTR pszSubKey, PCWSTR pszValueName, | ||
| PCWSTR pszData) | ||
| { | ||
| HRESULT hr; | ||
| HKEY hKey = NULL; | ||
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| // Creates the specified registry key. If the key already exists, the | ||
| // function opens it. | ||
| hr = HRESULT_FROM_WIN32(RegCreateKeyEx(HKEY_CLASSES_ROOT, pszSubKey, 0, | ||
| NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKey, NULL)); | ||
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| if (SUCCEEDED(hr)) | ||
| { | ||
| if (pszData != NULL) | ||
| { | ||
| // Set the specified value of the key. | ||
| DWORD cbData = lstrlen(pszData) * sizeof(*pszData); | ||
| hr = HRESULT_FROM_WIN32(RegSetValueEx(hKey, pszValueName, 0, | ||
| REG_SZ, reinterpret_cast<const BYTE *>(pszData), cbData)); | ||
| } | ||
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| RegCloseKey(hKey); | ||
| } | ||
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| return hr; | ||
| } | ||
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| // | ||
| // FUNCTION: GetHKCRRegistryKeyAndValue | ||
| // | ||
| // PURPOSE: The function opens a HKCR registry key and gets the data for the | ||
| // specified registry value name. | ||
| // | ||
| // PARAMETERS: | ||
| // * pszSubKey - specifies the registry key under HKCR. If the key does not | ||
| // exist, the function returns an error. | ||
| // * pszValueName - specifies the registry value to be retrieved. If | ||
| // pszValueName is NULL, the function will get the default value. | ||
| // * pszData - a pointer to a buffer that receives the value's string data. | ||
| // * cbData - specifies the size of the buffer in bytes. | ||
| // | ||
| // RETURN VALUE: | ||
| // If the function succeeds, it returns S_OK. Otherwise, it returns an | ||
| // HRESULT error code. For example, if the specified registry key does not | ||
| // exist or the data for the specified value name was not set, the function | ||
| // returns COR_E_FILENOTFOUND (0x80070002). | ||
| // | ||
| HRESULT GetHKCRRegistryKeyAndValue(PCWSTR pszSubKey, PCWSTR pszValueName, | ||
| PWSTR pszData, DWORD cbData) | ||
| { | ||
| HRESULT hr; | ||
| HKEY hKey = NULL; | ||
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| // Try to open the specified registry key. | ||
| hr = HRESULT_FROM_WIN32(RegOpenKeyEx(HKEY_CLASSES_ROOT, pszSubKey, 0, | ||
| KEY_READ, &hKey)); | ||
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| if (SUCCEEDED(hr)) | ||
| { | ||
| // Get the data for the specified value name. | ||
| hr = HRESULT_FROM_WIN32(RegQueryValueEx(hKey, pszValueName, NULL, | ||
| NULL, reinterpret_cast<LPBYTE>(pszData), &cbData)); | ||
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| RegCloseKey(hKey); | ||
| } | ||
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| return hr; | ||
| } | ||
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| #pragma endregion | ||
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| // | ||
| // FUNCTION: RegisterInprocServer | ||
| // | ||
| // PURPOSE: Register the in-process component in the registry. | ||
| // | ||
| // PARAMETERS: | ||
| // * pszModule - Path of the module that contains the component | ||
| // * clsid - Class ID of the component | ||
| // * pszFriendlyName - Friendly name | ||
| // * pszThreadModel - Threading model | ||
| // | ||
| // NOTE: The function creates the HKCR\CLSID\{<CLSID>} key in the registry. | ||
| // | ||
| // HKCR | ||
| // { | ||
| // NoRemove CLSID | ||
| // { | ||
| // ForceRemove {<CLSID>} = s '<Friendly Name>' | ||
| // { | ||
| // InprocServer32 = s '%MODULE%' | ||
| // { | ||
| // val ThreadingModel = s '<Thread Model>' | ||
| // } | ||
| // } | ||
| // } | ||
| // } | ||
| // | ||
| HRESULT RegisterInprocServer(PCWSTR pszModule, const CLSID& clsid, | ||
| PCWSTR pszFriendlyName, PCWSTR pszThreadModel) | ||
| { | ||
| if (pszModule == NULL || pszThreadModel == NULL) | ||
| { | ||
| return E_INVALIDARG; | ||
| } | ||
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| HRESULT hr; | ||
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| wchar_t szCLSID[MAX_PATH]; | ||
| StringFromGUID2(clsid, szCLSID, ARRAYSIZE(szCLSID)); | ||
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| wchar_t szSubkey[MAX_PATH]; | ||
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| // Create the HKCR\CLSID\{<CLSID>} key. | ||
| hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey), L"CLSID\\%s", szCLSID); | ||
| if (SUCCEEDED(hr)) | ||
| { | ||
| hr = SetHKCRRegistryKeyAndValue(szSubkey, NULL, pszFriendlyName); | ||
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| // Create the HKCR\CLSID\{<CLSID>}\InprocServer32 key. | ||
| if (SUCCEEDED(hr)) | ||
| { | ||
| hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey), | ||
| L"CLSID\\%s\\InprocServer32", szCLSID); | ||
| if (SUCCEEDED(hr)) | ||
| { | ||
| // Set the default value of the InprocServer32 key to the | ||
| // path of the COM module. | ||
| hr = SetHKCRRegistryKeyAndValue(szSubkey, NULL, pszModule); | ||
| if (SUCCEEDED(hr)) | ||
| { | ||
| // Set the threading model of the component. | ||
| hr = SetHKCRRegistryKeyAndValue(szSubkey, | ||
| L"ThreadingModel", pszThreadModel); | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| return hr; | ||
| } | ||
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| // | ||
| // FUNCTION: UnregisterInprocServer | ||
| // | ||
| // PURPOSE: Unegister the in-process component in the registry. | ||
| // | ||
| // PARAMETERS: | ||
| // * clsid - Class ID of the component | ||
| // | ||
| // NOTE: The function deletes the HKCR\CLSID\{<CLSID>} key in the registry. | ||
| // | ||
| HRESULT UnregisterInprocServer(const CLSID& clsid) | ||
| { | ||
| HRESULT hr = S_OK; | ||
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| wchar_t szCLSID[MAX_PATH]; | ||
| StringFromGUID2(clsid, szCLSID, ARRAYSIZE(szCLSID)); | ||
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| wchar_t szSubkey[MAX_PATH]; | ||
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| // Delete the HKCR\CLSID\{<CLSID>} key. | ||
| hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey), L"CLSID\\%s", szCLSID); | ||
| if (SUCCEEDED(hr)) | ||
| { | ||
| hr = HRESULT_FROM_WIN32(SHDeleteKey(HKEY_CLASSES_ROOT, szSubkey)); | ||
| } | ||
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| return hr; | ||
| } | ||
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| // | ||
| // FUNCTION: RegisterShellExtContextMenuHandler | ||
| // | ||
| // PURPOSE: Register the context menu handler. | ||
| // | ||
| // PARAMETERS: | ||
| // * pszFileType - The file type that the context menu handler is | ||
| // associated with. For example, '*' means all file types; '.txt' means | ||
| // all .txt files. The parameter must not be NULL. | ||
| // * clsid - Class ID of the component | ||
| // * pszFriendlyName - Friendly name | ||
| // | ||
| // NOTE: The function creates the following key in the registry. | ||
| // | ||
| // HKCR | ||
| // { | ||
| // NoRemove <File Type> | ||
| // { | ||
| // NoRemove shellex | ||
| // { | ||
| // NoRemove ContextMenuHandlers | ||
| // { | ||
| // {<CLSID>} = s '<Friendly Name>' | ||
| // } | ||
| // } | ||
| // } | ||
| // } | ||
| // | ||
| HRESULT RegisterShellExtContextMenuHandler( | ||
| PCWSTR pszFileType, const CLSID& clsid, PCWSTR pszFriendlyName) | ||
| { | ||
| if (pszFileType == NULL) | ||
| { | ||
| return E_INVALIDARG; | ||
| } | ||
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| HRESULT hr; | ||
|
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| wchar_t szCLSID[MAX_PATH]; | ||
| StringFromGUID2(clsid, szCLSID, ARRAYSIZE(szCLSID)); | ||
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| wchar_t szSubkey[MAX_PATH]; | ||
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| // If pszFileType starts with '.', try to read the default value of the | ||
| // HKCR\<File Type> key which contains the ProgID to which the file type | ||
| // is linked. | ||
| if (*pszFileType == L'.') | ||
| { | ||
| wchar_t szDefaultVal[260]; | ||
| hr = GetHKCRRegistryKeyAndValue(pszFileType, NULL, szDefaultVal, | ||
| sizeof(szDefaultVal)); | ||
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| // If the key exists and its default value is not empty, use the | ||
| // ProgID as the file type. | ||
| if (SUCCEEDED(hr) && szDefaultVal[0] != L'\0') | ||
| { | ||
| pszFileType = szDefaultVal; | ||
| } | ||
| } | ||
|
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| // Create the key HKCR\<File Type>\shellex\ContextMenuHandlers\{<CLSID>} | ||
| hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey), | ||
| L"%s\\shellex\\ContextMenuHandlers\\%s", pszFileType, szCLSID); | ||
| if (SUCCEEDED(hr)) | ||
| { | ||
| // Set the default value of the key. | ||
| hr = SetHKCRRegistryKeyAndValue(szSubkey, NULL, pszFriendlyName); | ||
| } | ||
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| return hr; | ||
| } | ||
|
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|
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| // | ||
| // FUNCTION: UnregisterShellExtContextMenuHandler | ||
| // | ||
| // PURPOSE: Unregister the context menu handler. | ||
| // | ||
| // PARAMETERS: | ||
| // * pszFileType - The file type that the context menu handler is | ||
| // associated with. For example, '*' means all file types; '.txt' means | ||
| // all .txt files. The parameter must not be NULL. | ||
| // * clsid - Class ID of the component | ||
| // | ||
| // NOTE: The function removes the {<CLSID>} key under | ||
| // HKCR\<File Type>\shellex\ContextMenuHandlers in the registry. | ||
| // | ||
| HRESULT UnregisterShellExtContextMenuHandler( | ||
| PCWSTR pszFileType, const CLSID& clsid) | ||
| { | ||
| if (pszFileType == NULL) | ||
| { | ||
| return E_INVALIDARG; | ||
| } | ||
|
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| HRESULT hr; | ||
|
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| wchar_t szCLSID[MAX_PATH]; | ||
| StringFromGUID2(clsid, szCLSID, ARRAYSIZE(szCLSID)); | ||
|
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| wchar_t szSubkey[MAX_PATH]; | ||
|
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| // If pszFileType starts with '.', try to read the default value of the | ||
| // HKCR\<File Type> key which contains the ProgID to which the file type | ||
| // is linked. | ||
| if (*pszFileType == L'.') | ||
| { | ||
| wchar_t szDefaultVal[260]; | ||
| hr = GetHKCRRegistryKeyAndValue(pszFileType, NULL, szDefaultVal, | ||
| sizeof(szDefaultVal)); | ||
|
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| // If the key exists and its default value is not empty, use the | ||
| // ProgID as the file type. | ||
| if (SUCCEEDED(hr) && szDefaultVal[0] != L'\0') | ||
| { | ||
| pszFileType = szDefaultVal; | ||
| } | ||
| } | ||
|
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| // Remove the HKCR\<File Type>\shellex\ContextMenuHandlers\{<CLSID>} key. | ||
| hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey), | ||
| L"%s\\shellex\\ContextMenuHandlers\\%s", pszFileType, szCLSID); | ||
| if (SUCCEEDED(hr)) | ||
| { | ||
| hr = HRESULT_FROM_WIN32(SHDeleteKey(HKEY_CLASSES_ROOT, szSubkey)); | ||
| } | ||
|
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| return hr; | ||
| } |
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