RAD Studio VCL Reference
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Classes

The following table lists classes in this documentation.

 
Name 
Description 
 
EBitsError is the exception class for invalid attempts to access an array of boolean values. 
 
EClassNotFound is the exception class for the failure to find a specified component when reading from a stream. 
 
EComponentError is the exception class for registering and renaming components. 
 
EFCreateError is the exception class for streaming file-creation errors. 
 
EFilerError is the exception class for component stream errors. 
 
EFileStreamError is the exception class for general stream errors. 
 
EFOpenError is the exception class for file-opening errors during streaming. 
 
EInvalidImage is the exception class for unsuccessful attempts to read resources. 
 
EInvalidOperation is the exception class for invalid operations on a component. 
 
EListError is the exception class for list and string errors. 
 
Deprecated, please use EReadError
 
EOutOfResources is the exception class for unsuccessful attempts to allocate handles. 
 
EParserError is the exception class for text-to-binary streaming conversion errors. 
 
EReadError is the exception class for unsuccessful attempts to read data from a stream. 
 
EResNotFound is the exception class for unlocatable resources. 
 
EStreamError is the exception class for streaming errors. 
 
EStringListError is the exception class for invalid listbox references. 
 
EThread is the exception class for thread synchronization errors. 
 
EWriteError is the exception class for unsuccessful attempts to write data to a stream. 
 
TBasicAction is the ancestor class for all action objects. 
 
TBasicActionLink is the base class for action link classes that handle the communication between actions and clients. 
 
TBits stores an array of Boolean values. 
 
This is class Classes.TClassFinder. 
 
TCollection is a container for TCollectionItem objects. 
 
Enumerates through the TCollectionItems in a TCollection object. 
 
TCollectionItem represents an item in a collection. 
 
TComponent is the common ancestor of all component classes. 
 
TComponentEnumerator allows the components within a containing component to be discovered. 
 
TCustomMemoryStream is an abstract base class used as the common ancestor for memory streams. 
 
TDataModule centralizes the handling of nonvisual components in an application. 
 
TFiler is the abstract base class for reader and writer objects, which are used for loading and saving components and their properties. 
 
TFileStream enables applications to read from and write to a file on disk. 
 
THandleStream enables applications to read from and write to communications resources identified by a handle. 
 
TInterfacedPersistent is an ancestor for persistent objects that implement interfaces. 
 
TInterfaceList represents a list of interfaces. 
 
Enumerates through the IInterfaces in a TInterfaceList
 
TList stores an array of pointers. 
 
Enumerates through the objects in a TList
 
TMemoryStream is a stream that stores its data in dynamic memory. 
 
TOwnedCollection is a collection that maintains information about its owner. 
 
TParser allows DFM files to be parsed. 
 
TPersistent is the ancestor for all objects that have assignment and streaming capabilities. 
 
TReader is a specialized filer that reads component data from an associated stream. 
 
TRecall stores the properties of a persistent object so that they can be restored at a later time. 
 
TResourceStream is a memory stream that provides access to the compiled resources in an application. 
 
TStream is the base class type for stream objects that can read from or write to various kinds of storage media, such as disk files, dynamic memory, and so on. 
 
TStreamAdapter implements the IStream interface on a TStream object. 
 
TStringList maintains a list of strings. 
 
TStrings is the base class for objects that represent a list of strings. 
 
Enumerates through the strings of a TStrings object. 
 
TStringStream provides file-like access to information stored as a long string. 
 
TThread is an abstract class that enables creation of separate threads of execution in an application. 
 
TThreadList represents a thread-safe list. 
 
TWriter is a specialized filer object that writes data to its associated stream. 
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