[Lazarus] SendMessage Bug Work Around.

[David W Noon]

On Fri, 23 Apr 2010 11:09:35 +0200, Michael Schnell wrote about Re:
[Lazarus] SendMessage Bug Work Around.:

[snip]
> I don't see why, in Windows, anybody should use SendMessage to send a
> message top a window that is assigned to the same process. AFAIK, this
> is what PostMessage (as well the VCL/LCL function as the Windows API
> call) is provided for.

The SendMessage() and PostMessage() API's have different semantics:

SendMessage() places a message on a message queue and waits for a
return code from the WndProc or DlgProc that processes the message;

PostMessage() places a message on a message queue and returns
to continue execution, without waiting for the message to be processed.

This distinction can be very important.
-- 
Regards,

Dave  [RLU #314465]
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david.w.noon at ntlworld.com (David W Noon)
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