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From: wieser@cs-sun-fsa.cpsc.ucalgary.ca (Bernhard Wieser)
Newsgroups: comp.sys.mac.programmer
Subject: SFPGetFile
Keywords: A4 SFGetFile dlgHook
Message-ID: <1990Nov3.032143.27001@cpsc.ucalgary.ca>
Date: 3 Nov 90 03:21:43 GMT
Organization: U. of Calgary Computer Science
Lines: 32
Originator: wieser@cs-sun-fsd
Nntp-Posting-Host: cs-sun-fsd

Hi net-people!

I think I've discovered a neat hack.  Of course, hacking is bad, so
I'd like people's comments on how safe this is.

What I did, is add a button to the standard get file dialog which would
exit out of SFPGetFile and return the active list item (if any).  Why?
I want to be able to select a folder without opening it.  I didn't
want to write tons of code to manage the stuff if theoretically its
already lying around.

pascal int dlgHook(item, theDialog)
int item;
DialogPtr theDialog;
{
	SFReply *reply;

	if(item == myButton) {
		asm{
			MOVE.L	A4,reply ; assume A4 holds the reply record
			}
		reply->good = TRUE;
		item = getCancel;
		}
	return(item);
}

This seems to work perfectly, BUT, can I always rely on A4 pointing to
SFReply?

Please send me replies vie e-mail if you have comments/grumbles.
Bernie Wieser, Student at U of C, Developer of Computer Things