I always presumed the reason for that was because a pointer to the global form variable is left "dangling" and you will have no way to know if the app is still in memory or not (not to mention causing a GPF if you inadvertantly refer to after freeing). After freeing, you always want to set the form variable to nil so the "If Assigned" check will work. I.E. Form1.free; Form1 := nil;
Dave --- On Tue, 11/18/08, Wilson, Stephen <[EMAIL PROTECTED]> wrote: From: Wilson, Stephen <[EMAIL PROTECTED]> Subject: RE: [delphi-en] Multiple instances of form To: [email protected] Date: Tuesday, November 18, 2008, 8:52 AM The disadvantage (for me, at least in this case) of calling Release is that it is not then possible to write anything in OnClose which, as shown by Doug's mail (thanks, Doug), doesn't get called. Since Release is called in the Close event (thanks again, Doug), one can't Close and then Release. So, I think you are right iin recommending OnClose + caFree, Dave and I will follow that in my app, but I don't understand the Delphi Help on TCustomForm. Release - "Any event handlers of the form should use Release instead of Free". Cheers Steve -----Original Message----- From: [EMAIL PROTECTED] ps.com [mailto:[EMAIL PROTECTED] ps.com]On Behalf Of David Smith Sent: 18 November 2008 15:40 To: [EMAIL PROTECTED] ps.com Subject: RE: [delphi-en] Multiple instances of form No, I was quoting the recommendations from the manual which I have followed religiously for years because they always work. That's what the OnClose event is for (It's go the action parameter for just that purpose). But go ahead and do what you want. Those debates seem utterly pointless to me when you can just look in the manual to see what it says. Dave - ************ ********* ********* ********* ********* ********* ********* ********* This e-mail and any files transmitted with it are confidential. If you are not the intended recipient, any reading, printing, storage, disclosure, copying or any other action taken in respect of this e-mail is prohibited and may be unlawful. If you are not the intended recipient, please notify the sender immediately by using the reply function and then permanently delete what you have received. Content of emails received by this Trust will be subject to disclosure under the Freedom of Information Act 2000, subject to the specified exemptions, including the Data Protection Act 1998 and Caldicott Guardian principles. This footnote also confirms that, unless otherwise stated, this email message has been swept by Sophos Anti-virus for the presence of computer viruses. ************ ********* ********* ********* ********* ********* ********* ********* [Non-text portions of this message have been removed]
