The call back runs in the thread/process of the called program.
A message is sent to the window where the callback function resides, this
is message includes the necessary parameters and is processed by the
Thread/Process of the callback function and the result is passed back in a
message.
This means a process alway executes it own code at it own priority, in it
own environment etc.
-----Original Message-----
From: INTERNET:[EMAIL PROTECTED]
Sent: Sunday, 18 April 1999 21:59
To: Multiple recipients of list delphi
Subject: RE: [DUG]: Call backs
I suspect differently because of the SendMessageCallback
From Win32 help :
The SendMessageCallback function sends the specified message to a window or
windows. The function calls the window procedure for the specified window
and returns immediately. After the window procedure processes the message,
the system calls the specified callback function, passing the result of the
message processing and an application-defined value to the callback
function.
-----Original Message-----
From: INTERNET:[EMAIL PROTECTED]
Sent: Sunday, 18 April 1999 19:43
To: Multiple recipients of list delphi
Subject: Re: [DUG]: Call backs
It would have to be the caller wouldn't it? The callee can't see the
callers stack...
Maurice Butler <[EMAIL PROTECTED]> on 19/04/99 12:31:15
Please respond to [EMAIL PROTECTED]
To: Multiple recipients of list delphi <[EMAIL PROTECTED]>
cc: (bcc: Peter Jones/Logistics&Information
Technology/Christchurch/Foodstuffs)
Subject: [DUG]: Call backs
Hi all,
Something I couldn't find in the win95 api help. Short of writing a small
test program, does a call back execute using the thread of the calling
program or the thread of called program.
Thanks
Maurice Butler
Like Magic Ltd
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