what is difference between queued messages and non queued mesages

Question

what is difference between queued messages and non queued mesages

Answer 1

Depends on who implement the concept of the queue. The concept is not defined in the C++ standard so there is no definite answer. If you want a definite answer, post to a forum where the implementation is implied.

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Answer 2

Hi Neeraj,

Message queues is used to route mouse and keyboard input to the appropriate window.
Nonqueued messages are sent immediately to the destination window procedure, bypassing the system message queue and thread message queue.

Help you to understand queued messages and non queued message more detailed, please see this article:

About Messages and Message Queues
http://msdn.microsoft.com/en-us/library/ms644927(VS.85).aspx#nonqueued_messages

Nonqueued Windows Messages
http://www.cplusplus.com/forum/windows/10287/

Best Regards,
Nancy

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Answer 3

Well for windows messages...

Messages posted via PostMessage are queued, while those send via SendMessage are not queued.

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Microsoft MVP - Visual C++
Blog: http://nibuthomas.com

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