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From: kw1r+@andrew.cmu.edu (Kevin Whitley)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Help me please
Message-ID: <8YlT4ky00VQa01skZw@andrew.cmu.edu>
Date: 20 Jul 89 15:35:12 GMT
Organization: Center for Design of Educational Computing, Carnegie Mellon, Pittsburgh, PA
Lines: 49

Jon,

If you happen to be using Lightspeed C, the easiest thing to do is to
use their routine execl.
You would use it as follows

execl("volume:folder1:folder2:program");

and it goes.  This has the disadvantage of needing a path, which is easy
to hardcode, awkward to get out of the StdFileDialog.


A more Mac approach (in LSC) is:

DoLaunch()	/* run a launch */
/* returns FALSE for cancelled dialog */
	{
	SFReply launchFile;
	long tList;
	Point atWhere;
	ioParam volDat;

	SetPt(&atWhere,100,80);	/* upper left corner of where dialog box will
appear */
	tList = 'APPL';		/* so dialog box lists applications */
	SFGetFile(atWhere,0L,0L,1,&tList,0L,&launchFile);	/* run dialog */
	if (!launchFile.good)
		{ /* user cancelled */
		return(FALSE);
		}

	/* change volume (or working directory) to where application is */
	volDat.ioCompletion = 0L;
	volDat.ioNamePtr = 0L;
	volDat.ioVRefNum = launchFile.vRefNum;
	PBSetVol(&volDat,FALSE);

	/* do the launch */
	Launch(0,launchFile.fName);

	return(TRUE); /* shouldn't ever get here! */
	}


Kevin Whitley
kw1r@andrew.cmu.edu