API Categories Index 2: Learn about All Routines and Classes Included in the RTL

The Delphi Run-Time Library (or RTL) is composed of a number of base units that provide the underlying support for most of the VCL component libraries. The RTL includes global routines, utility classes such as those that represent streams and lists, and classes such as TObject, TPersistent, and TComponent.

This section lists all routines and classes included in the RTL, split by categories. You can use these lists to navigate according to your needs.

API Category	Unit(s)
Action Support Routines	Vcl.ActnList, Vcl.ActnMenus, System.Actions
Application-level Information	Vcl.Forms, Vcl.Menus, System, System.SysUtils
BCD Support Routines	Data.FmtBcd
Business And Finance Routines	System.Math
Character Manipulation Routines	System.Character, System, System.SysUtils
Clipboard Support Routines	Vcl.Clipbrd
Color Constants	Vcl.Graphics
Command Line Support Routines	System, System.SysUtils
COM and OLE Support Routines	Vcl.ComCtrls, System.Win.ComObj, System.Win.ObjComAuto, System.ObjAuto, Vcl.OleCtrls
Comparison Routines	System.Classes, System.DateUtils, System.Math, System.SysUtils, System.Variants
Complex Numbers Support Routines	System.VarCmplx
Copy Mode Constants	Vcl.Graphics
DataSnap Client Controls	Datasnap.DBClient, Datasnap.DSConnect, Datasnap.Win.MConnect, Datasnap.Win.ObjBrkr, Datasnap.Win.SConnect, Datasnap.Win.TConnect
DataSnap Server Controls	Datasnap.DSAuth, Datasnap.DSClientMetadata, Datasnap.DSClientRest, Datasnap.DSHTTPCommon, Datasnap.DSHTTP, Datasnap.DSServer, Datasnap.DSTCPServerTransport
Date and Time Support	System.DateUtils, System.SysUtils, System
Delphi Data Types for API Integration	System
Dialogs Support Routines	Vcl.Controls, Vcl.Dialogs
Disk And Directory Support Routines	System.IOUtils, System, System.SysUtils
Dynamic Memory Allocation Routines	System
File Attribute List	System.SysUtils
File Input and Output Support	System, System.SysUtils
File Mode Constants	System.SysUtils
Floating-Point Number Control Routines	System.Math, System
GUID And Interface Support Routines	System.SysUtils, System.Variants
Delphi Intrinsic Routines	System
LiveBinding	System.Bindings.CustomScope, System.Bindings.CustomWrapper, System.Bindings.Factories, System.Bindings.Helper, System.Bindings.EvalProtocol, System.Bindings.Outputs, System.Bindings.Methods, System.Bindings.Expression, System.Bindings.ExpressionDefaults, System.Bindings.Manager, System.Bindings.ManagerDefaults
Mathematical Routines	System.Math, System
Menus Support Routines	Vcl.Menus
Modal Result Constants	Vcl.Controls
Operator Constants	System
Path Manipulation Routines	Vcl.FileCtrl, System.IOUtils, System.SysUtils
Random Support Routines	System.AnsiStrings, System.Math, System, System.SysUtils
String Handling Routines	System.AnsiStrings, System.AnsiStringT, System.UnicodeString, System.StrUtils, System.SysUtils.TStringBuilder, System.SysUtils.TStringHelper, System.WideString
Streams, Reader and Writers	Vcl.AxCtrls, System.Classes, Datasnap.DBClient, Data.Win.ADODB, IBX.IBBlob, IBX.IBCustomDataSet, System.Win.ScktComp, Data.SqlExpr, System.Types, System.ZLib
Structured Data Types	System.Classes, System.Generics.Collections, System.Types
Thread Management Routines	System.Classes, Vcl.Forms, System
Type conversion routines	System.Classes, System.ConvUtils, Data.FmtBcd, Data.SqlTimSt, System, System.SysUtils, System.Types
UCS4 Conversion Routines	System
UTF-8 Conversion Routines	System.Classes, Vcl.Forms, System
Variant Support Routines	System, Data.FmtBcd, System.VarCmplx, System.VarConv, System.Internal.VarHlpr, System.Variants
Variant Types Constants	System
Web Services	Soap.OPToSOAPDomConv, Soap.SOAPHTTPClient, Soap.SOAPHTTPTrans, Soap.SOAPHTTPPasInv, Soap.SOAPConn, Soap.WebBrokerSOAP, Soap.WSDLPub
XML Support Routines	Xml.Win.msxmldom, Xml.XMLDoc, Xml.xmldom, Soap.XSBuiltIns

 

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