Please read http://www.codeproject.com/Messages/2922875/HOW-TO-ASK-A-QUESTION.aspx[^].

While true, the documentation states "measured clockwise". Provided the user has turned the monitor the same direction using both vendor's drivers, one of them is clearly wrong. Does WHQL still exist? If so, perhaps Microsoft would like a ping "Hey, you don't check this!".

cedricvictor wrote: I am a new one in windows driver Then I'd suggest starting with something simpeler, like a bare-bones driver. Bastard Programmer from Hell :suss: If you can't read my code, try converting it here[^]

cedricvictor wrote: I don't know how to begin Begin at http://msdn.microsoft.com/en-gb/windows/hardware/hh852365.aspx[^].

Sorry, I just agree with your opinions, so I can't help myself to reply you. :laugh:

I would assume that data structures are initialized to play the sound, and then the data structures are kept for the next sound to play. The difficult we do right away... ...the impossible takes slightly longer.

cedricvictor wrote: How do I know my device send no data in WindowProc, if I did not touch? You cannot test for something not happening, only for things that do happen. You could use a flag in your WindowProc, which starts as false and gets set to true if you receive a touch input. At the end of the routine if the flag is still false then set your value to zero.

I can't understand your question well. Firstly, you read the file synchronous, so if no fails happens, it will be blocked here if no data income. I think so, happy to communicate with you !

Sorry, my original message was incorrect (the MSDN description lacks clarity). This should capture all messages, not just those directed to your application.

Dear Randor: You are right. In other function, the service is exist. So the function always return false. Thank for your help, Victor

cedricvictor wrote: Could you send me these files, please? You would have to install svn to be able to check out. I have no installation of svn on my working computer, so I will not be able to send you the files. :( cedricvictor wrote: I have been try your reference, but it still no sound with buzzer Is the code running ? Is your buzzer working at all ? ~RaGE(); I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus Entropy isn't what is used to.

You're not installing a mouse hook. Rather, you're installing a CallWndProc hook. From this hook proc, you're trying to get the pointer Id from WPARAM. The documentation of CallWndProc[^] says - Type: WPARAM Specifies whether the message was sent by the current thread. If the message was sent by the current thread, it is nonzero; otherwise, it is zero. I'm guessing you should use MouseProc[^] here. «_Superman_»  _I love work. It gives me something to do between weekends. _Microsoft MVP (Visual C++) (October 2009 - September 2013) Polymorphism in C

Dear «_Superman_»: I want to play sound from buzzer on computer, not from sound card. Thank for your help, Victor.

Dear Randor: I think you are right. It is different between touch and mouse. when left mouse button down, it will play sound. when I touch the panel, and leave fast, it will play or touch the panel, and then move my finger on panel, it will play sound, too. Thank for your help, Victor.

Try this link [Quickstart: Touch input (Windows Store apps using C#/VB/C++ and XAML)] []

Please verify that the Hook got installed properly. Once the hook is installed, you should be able to get the messages. When the mouse event is received, you can check the window handle. Using that window handle, identify the class type of the window. [Delegates]      [Virtual Desktop]      [Tray Me !] -Malli...! :rose:****