What does the Result property of a windows message mean and when and how to use it?

Question

Result property meaning:

Specifies the value that is returned to window in response to handling the message

But <

Answer 1

I depends on the message. According to the API reference it is bound to the specific message.

http://msdn.microsoft.com/en-us/library/windows/desktop/ms644950%28v=vs.85%29.aspx

E.g.:

Return value

An application returns zero if it processes this message.

http://msdn.microsoft.com/en-us/library/windows/desktop/dd145213%28v=vs.85%29.aspx

It can be used as a flag, indicating that the message doesn't need further attendance.

If your application handles, i.e. processes the message, a result of 0 will do.