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#include "Reg.h"
#include <strsafe.h>
//
// 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;
// Creates the specified registry key. If the key already exists, the
// function opens it.
hr = HRESULT_FROM_WIN32(RegCreateKeyEx(
#ifdef CATCHCOPY_ROOT_MODE
HKEY_CLASSES_ROOT
#else
HKEY_CURRENT_USER
#endif
, pszSubKey, 0,
NULL, REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS | KEY_WOW64_64KEY, NULL, &hKey, NULL));
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));
}
RegCloseKey(hKey);
}
return hr;
}
LONG RecursiveDeleteKey(HKEY hKeyParent, PCWSTR szKeyChild)
{
// Open the child.
HKEY hKeyChild ;
LONG lRes = RegOpenKeyEx(hKeyParent, szKeyChild, 0,
KEY_ALL_ACCESS | KEY_WOW64_64KEY, &hKeyChild) ;
if (lRes != ERROR_SUCCESS)
{
return lRes ;
}
// Enumerate all of the decendents of this child.
FILETIME time ;
wchar_t szBuffer[MAX_PATH];
DWORD dwSize = MAX_PATH ;
while (RegEnumKeyEx(hKeyChild, 0, (LPWSTR)szBuffer, &dwSize, NULL,
NULL, NULL, &time) == ERROR_SUCCESS)
{
// Delete the decendents of this child.
lRes = RecursiveDeleteKey(hKeyChild, (PCWSTR)szBuffer) ;
if (lRes != ERROR_SUCCESS)
{
// Cleanup before exiting.
RegCloseKey(hKeyChild) ;
return lRes;
}
dwSize = MAX_PATH ;
}
// Close the child.
RegCloseKey(hKeyChild) ;
// Delete this child.
return RegDeleteKey(hKeyParent, szKeyChild) ;
}
//
// 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;
// Try to open the specified registry key.
hr = HRESULT_FROM_WIN32(RegOpenKeyEx(
#ifdef CATCHCOPY_ROOT_MODE
HKEY_CLASSES_ROOT
#else
HKEY_CURRENT_USER
#endif
, pszSubKey, 0,
KEY_READ, &hKey));
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));
RegCloseKey(hKey);
}
return hr;
}
//
// 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;
}
HRESULT hr;
wchar_t szCLSID[MAX_PATH];
StringFromGUID2(clsid, szCLSID, ARRAYSIZE(szCLSID));
wchar_t szSubkey[MAX_PATH];
// Create the HKCR\CLSID\{<CLSID>} key.
hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey),
#ifdef CATCHCOPY_ROOT_MODE
L"CLSID\\%s"
#else
L"Software\\Classes\\CLSID\\%s"
#endif
, szCLSID);
if (SUCCEEDED(hr))
{
hr = SetHKCRRegistryKeyAndValue(szSubkey, NULL, pszFriendlyName);
// Create the HKCR\CLSID\{<CLSID>}\InprocServer32 key.
if (SUCCEEDED(hr))
{
hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey),
#ifdef CATCHCOPY_ROOT_MODE
L"CLSID\\%s\\InprocServer32"
#else
L"Software\\Classes\\CLSID\\%s\\InprocServer32"
#endif
, 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);
}
}
}
}
return hr;
}
//
// 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;
wchar_t szCLSID[MAX_PATH];
StringFromGUID2(clsid, szCLSID, ARRAYSIZE(szCLSID));
wchar_t szSubkey[MAX_PATH];
// Delete the HKCR\CLSID\{<CLSID>} key.
hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey),
#ifdef CATCHCOPY_ROOT_MODE
L"CLSID\\%s"
#else
L"Software\\Classes\\CLSID\\%s"
#endif
, szCLSID);
if (SUCCEEDED(hr))
{
hr = HRESULT_FROM_WIN32(RecursiveDeleteKey(
#ifdef CATCHCOPY_ROOT_MODE
HKEY_CLASSES_ROOT
#else
HKEY_CURRENT_USER
#endif
, szSubkey));
}
return hr;
}
//
// 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;
}
HRESULT hr;
wchar_t szCLSID[MAX_PATH];
StringFromGUID2(clsid, szCLSID, ARRAYSIZE(szCLSID));
wchar_t szSubkey[MAX_PATH];
// 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));
// 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;
}
}
// Create the key HKCR\<File Type>\shellex\DragDropHandlers\{<CLSID>}
hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey),
#ifdef CATCHCOPY_ROOT_MODE
L"%s\\shellex\\DragDropHandlers\\%s"
#else
L"Software\\Classes\\%s\\shellex\\DragDropHandlers\\%s"
#endif
, pszFileType, szCLSID);
if (SUCCEEDED(hr))
{
// Set the default value of the key.
hr = SetHKCRRegistryKeyAndValue(szSubkey, NULL, pszFriendlyName);
}
return hr;
}
//
// 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;
}
HRESULT hr;
wchar_t szCLSID[MAX_PATH];
StringFromGUID2(clsid, szCLSID, ARRAYSIZE(szCLSID));
wchar_t szSubkey[MAX_PATH];
// 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));
// 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;
}
}
// Remove the HKCR\<File Type>\shellex\DragDropHandlers\{<CLSID>} key.
hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey),
#ifdef CATCHCOPY_ROOT_MODE
L"%s\\shellex\\DragDropHandlers\\%s"
#else
L"Software\\Classes\\%s\\shellex\\DragDropHandlers\\%s"
#endif
, pszFileType, szCLSID);
if (SUCCEEDED(hr))
{
hr = HRESULT_FROM_WIN32(RecursiveDeleteKey(
#ifdef CATCHCOPY_ROOT_MODE
HKEY_CLASSES_ROOT
#else
HKEY_CURRENT_USER
#endif
, szSubkey));
}
return hr;
}
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