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Content-type: text/plain
> -----Original Message-----
> From: Fyodor Tkachov [mailto:fyodor.tkachov{([at]})nowhere.xy> Sent: Sunday, 3 October 2004 11:06 PM
> To: Blackbox Mailing-List
> Cc: H. v. L.; CFB Software
> Subject: Re: eliminate EXTENSIBLE types?
>
> Chris, could you expand a little on why you must use EXTENSIBLE's
> within .NET?
>
Super calls are needed in .NET when working with a WinForms Form to Dispose
of the resources (other than memory) used by the Form.
WinForms Forms are extensions of the Framework type:
System.Windows.Forms.Form
Typically, when implementing a WinForms Form using Gardens Point Component
Pascal you would declare an extended type:
TYPE
MenuForm* = POINTER TO RECORD (Wfm.Form)
mainMenu: Wfm.MainMenu;
statusBar: Wfm.StatusBar;
printPreviewDialog: Wfm.PrintPreviewDialog;
...
...
You are also expected to provide a Dispose method for this descendant type
which calls the base type's Dispose method via a super call. e.g.
PROCEDURE (frm: MenuForm) Dispose*(disposing: BOOLEAN);
BEGIN
IF disposing THEN
IF frm.components # NIL THEN
frm.components.Dispose();
END;
frm.Dispose^(disposing);
END;
END Dispose;
For more details, go to:
http://msdn.microsoft.com/netframework/
Search for "Form.Dispose Method" and read the contents of the returned topic
"Form.Dispose Method (Boolean) (.NET Framework)".
Chris Burrows
CFB Software
http://www.cfbsoftware.com/gpcp
--------------------------------------------
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Received on Mon Oct 04 2004 - 02:25:11 UTC