OpenEuphoria

Re: inputbox

• Posted by Bernie <xotron at PCOM.NET> Jul 27, 2000
• 376 views

On Thu, 27 Jul 2000 12:20:39 +0200, =?iso-8859-2?B?qWtvZGE=?=
<tone.skoda at SIOL.NET> wrote:



>>are you saying that messages for all windows an application has go thru
that
>>loop? i thought there were messages just for main application window.


   The message loop is a part of each window's application.

   The WINDOW PROCEDURE function is a CALLBACK function.

   When any application or thread is running and it needs to be notified

   by the windows operating system, that some action has taken place within

   that ( application ) window. Whenever the operating system see that

   a particular window needs something to be done it places a message in

   the message Que that the operating system has reserved for that

   particular application.

   The OS then calls your CALLBACK WINDOW PROCEDURE FUNCTION.

   in your application you are responsible to handle that message or

   you can send the message to a DEFAULT OS WINDOW PROCEDURE. Get message

   will get the message that is in your application's message Que.

   Every Application that is running on your computer has a message Que

   including the OS. So there is no way that I know of getting a message

   from the OS without callback function and message loop.

   Without a callback procedure function there would be no way to know

   which message was yours and how current it is.