Article View: borland.public.delphi.language.objectpascal
Article #94Message methods
From: Richard Bibby
Date: Mon, 26 Jan 2004 09:26
Date: Mon, 26 Jan 2004 09:26
33 lines
1879 bytes
1879 bytes
Hello,
I have an application that generates Crystal Reports document. Along the way
it creates an xml document (TXMLDocument) and a com object.
This app works fine... and i have a single procedure call that does all the
hard work.
The problem occurs when i start to use the wm_copydata message.
I want other apps to be able to send a message to mine so that they can use
my app as a sort of "crystal reports print server"
I have create a message method connected to the wm_copydata message. The
message identifies the document to be printed.
However i am getting all sorts of problems in the wm_copydata message
method. It does not appear to like my call to create a xml document.
The second line here throws an exception:
//create DOM document instance
Reply := TXMLDocument.Create( nil );
Reply.Active := true ;
Reply is declared as IXMLDocument.
I can place this code anywhere in my app, and it works. It just doesn't work
in the wm_copydata message method.
Any ideas?
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