Yes, you're right... i usually use release when i open form using 'ShowModal', right after the close command to release all object variable. But if you open a form using 'Show' command it will be better if u use caFree in the Close events. But if you want to write your own code to release all the variables and object, using PostMessage or SendMessage, it wont be a problem.
I dont know which one is better but i think they all are the same. ----- Original Message ----- From: Wilson, Stephen To: [email protected] Sent: Wednesday, November 19, 2008 4:31 PM Subject: RE: [delphi-en] Multiple instances of form Thanks all for your comments on and insights into this subject (looks like I started again that debate I said I'd seen in the past!). I think I'm getting my head around this now: if you close a form using OnClose with caFree, Release gets called (see Doug Hale's code quotation) which posts a CM_RELEASE message to the form allowing all other messages to be processed before this one (see Theo's explanation), and finally Delphi's message handler for CM_RELEASE, TCustomForm.CMRelease, calls Free, in which case it would be prudent to set the existing pointer to nil. If I've misunderstood, then I'm probably just too dumb ever to understand it - I should forget the technical and just take the empirical approach! Thanks again for all the input. [Non-text portions of this message have been removed]
