Your full service technology partner! 
-Collapse +Expand
Search Delphi Group:

-Collapse +Expand Delphi To/From
-Collapse +Expand Delphi Store

Prestwood eMagazine

July Edition
Subscribe now! It's Free!
Enter your email:

   ► KBProgrammingDelphi for W...Language Det...   Print This    All Groups  
  From the June 2010 Issue of Prestwood eMag
Delphi Language Details:
Delphi Pointers
Posted 11 years ago on 2/28/2009
Delphi Code Snippet:
 A flashcard from our Delphi Flashcards Library
 A code snippet from our Delphi Code Snippets Page
 Tags: Delphi , Pointers


General Info: Pointers / References

A pointer is a variable type that allows you to refer indirectly to another object. Instead of holding data, a pointer holds the address to data -- the address of another variable or object. You can change the address value a pointer points to thus changing the variable or object the pointer is pointing to.

A reference is a type of pointer that cannot change and it must always point to a valid storage (no nulls).

Delphi Pointers

Although pointer data types in Delphi coding are less important and not required for most general coding, Delphi fully supports developer defined pointers. Use a carrot (^) to declare a pointer data type. Use the @ operator or Addr function to return the current address of a variable.

Delphi provides typed pointer types such as PChar and PExtended as well as a generic point to anything Pointer type.

Nil is a special pointer value that you can assign to any type of pointer. Nil never points to any valid memory and indicates an unassigned or empty pointer.

Syntax Example:
//Declare a pointer of type integer.
PCounter : ^Integer;
//Assign a value to the location of a pointer.
//Also known as dereferencing.
PCounter^ := 8;
//Assign address of A to B.
PointerB := @PointerA;  //or...PointerB := Addr(PointerA);

More Info

Definition:  Pointers / References


Share a thought or comment...
Write a Comment...
Sign in...

If you are a member, Sign In. Or, you can Create a Free account now.

Anonymous Post (text-only, no HTML):

Enter your name and security key.

Your Name:
Security key = P125A1
Enter key:
Code Contributed By Mike Prestwood:

Mike Prestwood is a drummer, an author, and creator of the PrestwoodBoards online community. He is the President & CEO of Prestwood IT Solutions. Prestwood IT provides Coding, Website, and Computer Tech services. Mike has authored 6 computer books and over 1,200 articles. As a drummer, he maintains and has authored 3 drum books. If you have a project you wish to discuss with Mike, you can send him a private message through his PrestwoodBoards home page or call him 9AM to 4PM PST at 916-726-5675 x205.

Visit Profile

 KB Article #101939 Counter
Since 2/28/2009
Sales Website: Or visit our legacy sales site:

©1995-2020 Prestwood IT Solutions.   [Security & Privacy]