Re: WM_COPYDATA problem

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#1355

From: Damon Chandler (TeamB)
Date: Mon, 03 Sep 2007 06:44

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Hi,

You're catching the WM_COPYDATA in your TFormMain class, but you're 
sending the message to the window whose handle is returned via the 
following call...

HWND hWnd = FindWindow("TApplication", "MutexTest");

I don't believe the above call is returning the correct handle.  You 
should replace "TApplication" with "TFormMain" and adjust the second 
parameter to the form's caption.

As a side note, there's no need to use the WindowProc property since you 
can override the WndProc() method directly.

Cheers,
--
Damon Chandler (TeamB)
C++Builder Developer's Journal
http://bcbjournal.com
http://bcbjournal.org

anon5 wrote:
> Hey guys
> 
> I am trying to create a 'once-only' app (only one instance can run). 
[snip 8<----]
> Now, the once-only aspect of the app works great. But my WM_COPYDATA 
> message isn't being picked up at all. If anyone can help at all it would 
> be fantastic. Thanks!

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