Delphi Basics : RTL By category : Types

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Unit	Type	Summary

System	AnsiChar	A character type guaranteed to be 8 bits in size
System	AnsiString	A data type that holds a string of AnsiChars
System	Boolean	Allows just True and False values
System	Byte	An integer type supporting values 0 to 255
System	Cardinal	The basic unsigned integer type
System	Char	Variable type holding a single character
System	Comp	A 64 bit signed integer
System	Currency	A floating point type with 4 decimals used for financial values
System	Double	A floating point type supporting about 15 digits of precision
System	Extended	The floating point type with the highest capacity and precision
System	Int64	A 64 bit sized integer - the largest in Delphi
System	Integer	The basic Integer type
System	LongInt	An Integer whose size is guaranteed to be 32 bits
System	LongWord	A 32 bit unsigned integer
System	PAnsiChar	A pointer to an AnsiChar value
System	PAnsiString	Pointer to an AnsiString value
System	PChar	A pointer to an Char value
System	PCurrency	Pointer to a Currency value
System	PDateTime	Pointer to a TDateTime value
System	PExtended	Pointer to a Extended floating point value
System	PInt64	Pointer to an Int64 value
System	Pointer	Defines a general use Pointer to any memory based data
System	PShortString	A pointer to an ShortString value
System	PString	Pointer to a String value
System	PVariant	Pointer to a Variant value
System	PWideChar	Pointer to a WideChar
System	PWideString	Pointer to a WideString value
System	Real	A floating point type supporting about 15 digits of precision
System	Real48	The floating point type with the highest capacity and precision
System	ShortInt	An integer type supporting values -128 to 127
System	ShortString	Defines a string of up to 255 characters
System	Single	The smallest capacity and precision floating point type
System	SmallInt	An Integer type supporting values from -32768 to 32767
System	String	A data type that holds a string of characters
Classes	TBits	An object that can hold an infinite number of Boolean values
ConvUtils	TConvType	Defines a measurement type as used by Convert
System	TDateTime	Data type holding a date and time value
System	Text	Defines a file as a text file
System	TextFile	Declares a file type for storing lines of text
SysUtils	TFloatFormat	Formats for use in floating point number display functions
SysUtils	TFormatSettings	A record for holding locale values for thread-safe functions
Classes	TList	General purpose container of a list of objects
System	TObject	The base class type that is ancestor to all other classes
Dialogs	TOpenDialog	Displays a file selection dialog
Types	TPoint	Holds X and Y integer values
Dialogs	TPrintDialog	Class that creates a printer selection and control dialog
Types	TRect	Holds rectangle coordinate values
SysUtils	TReplaceFlags	Defines options for the StringReplace routine
Dialogs	TSaveDialog	Displays a dialog for selecting a save file name
SysUtils	TSearchRec	Record used to hold data for FindFirst and FindNext
Classes	TStringList	Holds a variable length list of strings
SysUtils	TSysCharSet	Characters used by supplied string parsing functions
System	TThreadFunc	Defines the function to be called by BeginThread
System	Variant	A variable type that can hold changing data types
System	WideChar	Variable type holding a single International character
System	WideString	A data type that holds a string of WideChars
System	Word	An integer type supporting values 0 to 65535

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