[DUG] basic question

[Myles Penlington]

Yes you can do this. In this case the Self pointer is nil, and any
reference to any property on the from B will give a AV, but if no
references to class instance properties, then in effect you have a class
function.

 

Is not very good programming. Does not really make sense unless you want
to confuse someone!

 

Myles.

 

From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz]
On Behalf Of ani chakra
Sent: Wednesday, 25 July 2007 02:58
To: delphi at delphi.org.nz
Subject: [DUG] basic question

 

Hi,

Is it possible to call a method of a class without creating a object of
it, even if the method is not a class function in Delphi ? I wrote the
below code just to test -

1. Created a simple form A and a button on it. 
2. Created another simple form B, written a procedure in it as -
    FormB.Execute;
    begin
      ShowMessage("xyz");
    end;
3. Commented out auto creation of FormB in application.
4. On Button Click in FormA I called the Execute of FormB and it worked
perfectly okay. 

What could be the reason for this? I had the idea that either I need to
create an object before calling any method or I need to declare a class
function.

In the above steps when I am trying to call Show in Execute function of
Form B I got Access violation which is perfectly fine according to the
above statement. 

May be I am missing something simple here, but any pointers will be
great. This was done in D2005 and it's win32 app.

Thanks
-Ani



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