- uchar_data
: PurpleValue
- ui_data
: _GntWS, _PurpleWhiteboard, _PurpleRoomlist, PurpleRequestField, PurpleRequestFields, _PurpleXfer, _PurpleConversation, _PurpleBuddyList, _PurpleBlistNode, _PurpleAccount
- ui_info
: _PurplePluginInfo
- ui_ops
: _PurpleXfer, _PurpleConversation
- ui_requirement
: _PurplePluginInfo
- ui_settings
: _PurpleAccount
- ui_type
: _PurplePounce
- uint64_data
: PurpleValue
- uint_data
: PurpleValue
- ulong_data
: PurpleValue
- unblock
: _PidginWindow
- underline
: _GtkIMHtmlToolbar, _GtkIMHtmlFontDetail, _GtkIMHtml
- undo_manager
: _GtkIMHtml
- uninit
: FinchBlistManager, PurpleSslOps, _PurpleCipherOps, _PurpleCertificatePool
- unloadable
: _PurplePlugin
- unlocalized_name
: _PurpleAttentionType
- unregister_user
: _PurplePluginProtocolInfo
- unseen_count
: _PidginConversation
- unseen_state
: _PidginConversation
- update
: _PurpleBlistUiOps
- user_data
: _PurplePluginAction
- user_info
: _PurpleAccount
- user_splits
: _PurplePluginProtocolInfo
- userlist
: _FinchConvChat
- username
: PurpleProxyInfo, _PurpleAccount
- ushort_data
: PurpleValue