What is the difference between GetMessage and DispatchMessage function?
GetMessage pulls the WM_LBUTTONDOWN message from the queue and fills in the MSG structure. Your program calls the TranslateMessage and DispatchMessage functions. Inside DispatchMessage, the operating system calls your window procedure. Your window procedure can either respond to the message or ignore it.
What is TranslateMessage?
TranslateMessage() converts virtual keys messages to character input messages. It is a separate call for the remote chance that under certain circumstances you would want to not produce character input messages for certain virtual keys.
What are the differences between PeekMessage and GetMessage and when should each one of them be used?
The main difference between the two functions is that GetMessage does not return until a message matching the filter criteria is placed in the queue, whereas PeekMessage returns immediately regardless of whether a message is in the queue.
What does the method getMessage () do?
The getMessage() method of Throwable class is used to return a detailed message of the Throwable object which can also be null. One can use this method to get the detail message of exception as a string value.
How are messages processed in Windows?
Windows Messages The system passes input to a window procedure in the form of a message. Messages are generated by both the system and applications. The system generates a message at each input event—for example, when the user types, moves the mouse, or clicks a control such as a scroll bar.
What does the method GetMessage () do?
What does exception getMessage do?
The getMessage() method of Throwable class is used to return a detailed message of the Throwable object which can also be null. One can use this method to get the detail message of exception as a string value. Return Value: This method returns the detailed message of this Throwable instance.
What is the difference between DispatchMessage and TranslateMessage?
So DispatchMessage does the actual work of processing the message. TranslateMessage MAY or MAY NOT post a new message to the thread queue. If the message is translated then a character message is posted to the thread’s message queue. The TranslateMessage function does not modify the message pointed to by the lpMsg parameter.
How does the TranslateMessage function work?
The character messages are posted to the calling thread’s message queue, to be read the next time the thread calls the GetMessage or PeekMessage function. […] The TranslateMessage function does not modify the message pointed to by the lpMsg parameter.
What happens if the message is not translated?
If the message is not translated (that is, a character message is not posted to the thread’s message queue), the return value is zero. The TranslateMessage function does not modify the message pointed to by the lpMsg parameter. WM_KEYDOWN and WM_KEYUP combinations produce a WM_CHAR or WM_DEADCHAR message.
Does TranslateMessage post new messages to the thread queue?
TranslateMessage MAY or MAY NOT post a new message to the thread queue. If the message is translated then a character message is posted to the thread’s message queue. The TranslateMessage function does not modify the message pointed to by the lpMsg parameter.