How to send message to CWinApp derived object

[David Lowndes]

>could someone tell how to send custom message to CWinApp derived objec. I
>tied this:

Tomas,

Non window classes such as the CWinApp object can only handle special
categories of messages that MFC routes to non-window classes.

You can post user defined messages to windows - such as the main frame
window.

Dave
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[Tomas Butkus]

Hi,

could someone tell how to send custom message to CWinApp derived objec. I
tied this:

#define MYMSG (WM_APP + 1)
...
ON_MESSAGE(MYMSG, DoSomething)
...
SendMessage(MYMSG);

This not works- object didn't handle this message.
Should i use ON_THREAD_MESSAGE and PostThreadMessage(...) instead?

Thans in advance

--
Tomas Butkus

[David Wilkinson]

Tomas:

I have not done this, but I think that all posted messages to your
application can be trapped in CWinApp::PreTranslateMessage(). Return
TRUE if you handle the message or call the base class if you do not. You
can post the message itself to the main window.

Or you can send/post a "fake command message" using WM_COMMAND and use
WPARAM/LPARAM to identify the message.

You can also use PostThreadMessage(), but these messages can be lost if
a modal dialog or message box is opened before the message is processed.

Actually I think it is strange that MFC did not implement a
CWinApp::SendMessage/PostMessage capability.

But if you want to send, rather than post, the message, why not just
call a function in your CWinApp derived class?

HTH,

David Wilkinson

[Ajay Kalra]

Use PostThreadMessage to post a message to CWinApp.

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Ajay Kalra
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Microsoft VC++/MFC MVP

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Tomas Butkus <tom...@nomagiclt.com> wrote in message
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