PostMessage - What should the handler return?

[Cliff Hatch]

I've created a handler for a user defined message with the following declaration:

afx_msg LRESULT OnIdleScan(WPARAM wPar, LPARAM lPar);

It works, but what value (of type LRESULT) should the function return, and what does the system do with this? I assume it is not passed back via PostMessage, because it doesn't wait for the handler to execute. I'm arbitrarily returning 0 at present. Best Regards Cliff Hatch

[RChin]

The result is not used for PostMessage()'s, but it is when using SendMessage(). The return value is completely up to you. I usually just return 0, if its not important. I have come across a few messages that are used in this way to indicate success or failure.

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I Dream of Absolute Zero

[Cliff Hatch]

Thanks for your reply. It makes perfect sense now. :) Best Regards Cliff