自学教程：C++ DeleteKey函数代码示例

/* static public */HRESULT REGUTIL::UnregisterCOMClass( REFCLSID rclsid,		   									 const char *szProgIDPrefix,									 int iVersion,			  									 const char *szClassProgID ){	char szID[64];		   // the class ID to unregister.	char rcCLSID[64];	   // CLSID//szID.	OLECHAR	szWID[64];	   // helper for the class ID to unregister.	char rcProgID[128];	   // szProgIDPrefix.szClassProgID	char rcIndProgID[128]; // rcProgID.iVersion	// format the prog ID values.	sprintf( rcProgID, "%s.%s", szProgIDPrefix, szClassProgID );	sprintf( rcIndProgID, "%s.%d", rcProgID, iVersion );	REGUTIL::_UnregisterClassBase( rclsid, rcProgID, rcIndProgID, rcCLSID );	DeleteKey( rcCLSID, "InprocServer32" );    StringFromGUID2(rclsid, szWID, NumItems( szWID ) );	WideCharToMultiByte( CP_ACP, 						 0, 						 szWID, 						 -1, 						 szID, 						 sizeof( szID ), 						 NULL, 						 NULL );	DeleteKey( "CLSID", rcCLSID );			return S_OK;} // REGUTIL::UnregisterCOMClass

BOOL CRegKey::DeleteKey(HKEY hKey,LPCWSTR szKey){	if (!IsUnicodeSystem())		return DeleteKey(hKey,W2A(szKey));	HKEY hSubKey;	FILETIME ft;	DWORD cb;	WCHAR szSubKey[200];	if (RegOpenKeyExW(hKey,szKey,0,		KEY_ENUMERATE_SUB_KEYS|KEY_SET_VALUE,&hSubKey)!=ERROR_SUCCESS)		return TRUE;		DebugOpenHandle(dhtRegKey,hSubKey,szKey);		for(;;)	{		cb=400;		if (RegEnumKeyExW(hSubKey,0,szSubKey,&cb,NULL,			NULL,NULL,&ft)==ERROR_NO_MORE_ITEMS)			break;		DeleteKey(hSubKey,szSubKey);	}	RegCloseKey(hSubKey);	DebugCloseHandle(dhtRegKey,hSubKey,szKey);	RegDeleteKeyW(hKey,szKey);	return TRUE;}

//// Remove the component from the registry.//HRESULT UnregisterServer(const CLSID& clsid,      // Class ID                      const char* szProgID,       //   IDs                      const char* szVerIndProgID) // Programmatic{	// Convert the CLSID into a char.	char szCLSID[CLSID_STRING_SIZE] ;	CLSIDtoString(clsid, szCLSID, sizeof(szCLSID)) ;	// Build the key CLSID//{...}	char szKey[64] ;	strcpy(szKey, "CLSID//") ;	strcat(szKey, szCLSID) ;	// Delete the CLSID Key - CLSID/{...}	LONG lResult = DeleteKey(HKEY_CLASSES_ROOT, szKey) ;	// Delete the version-independent ProgID Key.	if (szVerIndProgID != NULL)		lResult = DeleteKey(HKEY_CLASSES_ROOT, szVerIndProgID) ;	// Delete the ProgID key.	if (szProgID != NULL)		lResult = DeleteKey(HKEY_CLASSES_ROOT, szProgID) ;	return S_OK ;}

void IniFile::DeleteSection ( wchar_t *section){	// deletes a whole INI section in the dictionary	int length;	int i;	wchar_t key[256];	if (section == NULL)		section = INIFile_default_section; // if no section was provided, use empty section name	swprintf (key, 256, L"%s%c", section, INI_SECTION_SEPARATOR); // compose the key	length = (int) wcslen (key); // get the key string length	// for each entry in the dictionary...	for (i = 0; i < Dictionary->entry_count; i++)	{		if (Dictionary->entries[i].key[0] == 0)			continue; // skip empty slots		// does this entry belong to the section we want ?		if (wcsncmp (Dictionary->entries[i].key, key, length) == 0)			DeleteKey ( Dictionary->entries[i].key); // yes, delete it	}	DeleteKey ( section); // and finally delete the section name itself	return;}

/*===============DelProp===============*/void DelProp(void){	char	sz[4096];	if (edit_entity == NULL)		return;	// Get current selection text	SendMessage(hwndEnt[EntKeyField], WM_GETTEXT, sizeof(sz)-1, (LPARAM)sz);		if (multiple_entities)	{		brush_t	*b;		for (b=selected_brushes.next ; b != &selected_brushes ; b=b->next)			DeleteKey(b->owner, sz);	}	else		DeleteKey(edit_entity, sz);	// refresh the prop listbox	SetKeyValuePairs();	}

/*	subKey を指定した
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