U++ framework: U++ Library : Other (not classified elsewhere) » Class method called by keyboard hook callback has an empty "this" pointer

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Re: Class method called by keyboard hook callback has an empty "this" pointer [message #37335 is a reply to message #37334]

Sun, 23 September 2012 12:51

dolik.rce
Messages: 1796
Registered: August 2008
Location: Czech Republic

Ultimate Contributor

Hi Mirko,

Welcome to the forum Cool

Mircode wrote on Sun, 23 September 2012 11:31

Inside the LowLevelKeyboardProc function, I call

MainWindow->ProcessKbdEvent(...)

but inside the ProcessKbdEvent method, "this" does not point to MainWindow. Instead, it is a nullpointer.

This would most probably happen if MainWindow==null at the time of calling MainWindow->ProcessKbdEvent(). You can add a check for this in LowLevelKeyboardProc to confirm this. I don't know how your code is structured, but I believe that the function is called before any instance of KeyBuddy2 is created or something like that.

Best regards,
Honza

[Updated on: Sun, 23 September 2012 12:52]

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[Message index]

		Class method called by keyboard hook callback has an empty "this" pointer By: Mircode on Sun, 23 September 2012 11:31
		Re: Class method called by keyboard hook callback has an empty "this" pointer By: dolik.rce on Sun, 23 September 2012 12:51
		Re: Class method called by keyboard hook callback has an empty "this" pointer By: Mircode on Sun, 23 September 2012 18:45
		Re: Class method called by keyboard hook callback has an empty "this" pointer By: dolik.rce on Sun, 23 September 2012 20:27
		Re: Class method called by keyboard hook callback has an empty "this" pointer By: Mircode on Mon, 24 September 2012 18:25
		Re: Class method called by keyboard hook callback has an empty "this" pointer By: nlneilson on Wed, 26 September 2012 01:16

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