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# Environment Classes

These classes providing various global services to your application such as event handling, access to system settings, internationalization, etc.

TQClipboard | Access to the window system clipboard
TQDesktopWidget | Access to screen information on multi-head systems
TQEvent | The base class of all event classes. Event objects contain event parameters
TQFontDatabase | Information about the fonts available in the underlying window system
TQMimeSourceFactory | Extensible provider of mime-typed data
TQMutex | Access serialization between threads
TQMutexLocker | Simplifies locking and unlocking TQMutexes
TQPixmapCache | Application-global cache for pixmaps
TQSemaphore | Robust integer semaphore
TQSessionManager | Access to the session manager
TQThread | Platform-independent threads
TQThreadStorage | Per-thread data storage
TQTranslator | Internationalization support for text output
TQTranslatorMessage | Translator message and its properties
TQWaitCondition | Allows waiting/waking for conditions between threads