Delphi Basics : RTL By functionality : PgmStruct

Type Name Summary

Procedure Abort Aborts the current processing with a silent exception

Keyword Begin Keyword that starts a statement block

Function BeginThread Begins a separate thread of code execution

Procedure Break Forces a jump out of a single loop

Keyword Case A mechanism for acting upon different values of an Ordinal

Function Chr Convert an integer into a character

Variable CmdLine Holds the execution text used to start the current program

Keyword Const Starts the definition of fixed data values

Procedure Continue Forces a jump to the next iteration of a loop

Procedure Dispose Dispose of storage used by a pointer type variable

Keyword Do Defines the start of some controlled action

Keyword DownTo Prefixes an decremental for loop target value

Keyword Else Starts false section of if, case and try statements

Keyword End Keyword that terminates statement blocks

Procedure EndThread Terminates a thread with an exit code

Variable ErrorAddr Sets the error address when an application terminates

Keyword Except Starts the error trapping clause of a Try statement

Procedure Exit Exit abruptly from a function or procedure

Variable ExitCode Sets the return code when an application terminates

Procedure FillChar Fills out a section of storage with a fill character or byte value

Keyword Finally Starts the unconditional code section of a Try statement

Function FindCmdLineSwitch Determine whether a certain parameter switch was passed

Keyword For Starts a loop that executes a finite number of times

Procedure FreeAndNil Free memory for an object and set it to nil

Procedure FreeMem Free memory storage used by a variable

Keyword Function Defines a subroutine that returns a value

Function GetMem Get a specified number of storage bytes

Keyword Goto Forces a jump to a label, regardless of nesting

Procedure Halt Terminates the program with an optional dialog

Keyword If Starts a conditional expression to determine what to do next

Keyword Implementation Starts the implementation (code) section of a Unit

Keyword Interface Used for Unit external definitions, and as a Class skeleton

Function IsMultiThread Returns true if the code is running multiple threads

Function Low Returns the lowest value of a type or variable

Procedure New Create a new pointer type variable

Constant Nil A pointer value that is defined as undetermined

Variable Null A variable that has no value

Keyword Of Linking keyword used in many places

Keyword On Defines exception handling in a Try Except clause

Keyword Packed Compacts complex data types into minimal storage

Function ParamCount Gives the number of parameters passed to the current program

Function ParamStr Returns one of the parameters used to run the current program

Directive Private Starts the section of private data and methods in a class

Keyword Procedure Defines a subroutine that does not return a value

Keyword Program Defines the start of an application

Directive Protected Starts a section of class private data accesible to sub-classes

Directive Public Starts an externally accessible section of a class

Directive Published Starts a published externally accessible section of a class

Keyword Raise Raise an exception

Procedure ReallocMem Reallocate an existing block of storage

Keyword Repeat Repeat statements until a ternmination condition is met

Variable Result A variable used to hold the return value from a function

Procedure RunError Terminates the program with an error dialog

Keyword Set Defines a set of up to 255 distinct values

Function SizeOf Gives the storage byte size of a type or variable

Keyword Then Part of an if statement - starts the true clause

Keyword ThreadVar Defines variables that are given separate instances per thread

Keyword To Prefixes an incremental for loop target value

Keyword Try Starts code that has error trapping

Type TThreadFunc Defines the function to be called by BeginThread

Keyword Type Defines a new category of variable or process

Keyword Unit Defines the start of a unit file - a Delphi module

Keyword Until Ends a Repeat control loop

Keyword Uses Declares a list of Units to be imported

Keyword Var Starts the definition of a section of data variables

Function VarType Gives the current type of a Variant variable

Constant VarTypeMask Mask for the meta-type part of a Variant variable

Keyword While Repeat statements whilst a continuation condition is met

Keyword With A means of simplifying references to structured variables

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