Is number of message queue(s) a Windows App can have is equal to threads in that app that create windows?
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Is number of message queue(s) a Windows App can have is equal to threads in that app that create windows?
Message queue is created only when thread creates a window. Before that a thread does not have any message queue. If creation of the queue will succeed or not depends on the amount of resources on the computer. The more RAM and free hard drive space you have, more treads and msg queues can be created. There is no any hardcoded limit on this.
In my experience starting more that a thousand threads most likely will create a problem even on a big box. But this still depends on the type of loaded drivers, number of network connections, etc.