wm_touch and wm_gesture Message
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From: Mao on 25 Dec 2009 02:30 Dear all: I'm a junior engineer in SW. And now, i try to develop a software to simulate a touch screen's operation without any touch hardware. In win 7, these two message, wm_touch and wm_gesture, can't be triggled directly by SendMessage and PostMessage. So In win7's touch architecture, these messages can only be triggled by a touch hardware? Or It can be triggled by other win api and other ways, like driver, to make it true? -- ....
From: David Ching on 25 Dec 2009 19:02 "Mao" <Mao(a)discussions.microsoft.com> wrote in message news:7D1BF478-8950-4723-BE3A-4344F7A793C1(a)microsoft.com... > Dear all: > I'm a junior engineer in SW. And now, i try to develop a software to > simulate a touch screen's operation without any touch hardware. In win 7, > these two message, wm_touch and wm_gesture, can't be triggled directly by > SendMessage and PostMessage. So In win7's touch architecture, these > messages > can only be triggled by a touch hardware? Or It can be triggled by other > win > api and other ways, like driver, to make it true? > Why do you say they can't be triggered with PostMessage()? Make sure the app that is posting has the same privilege as the one handling WM_TOUCH (or run the poster app As Administrator to be sure). -- David
From: Joseph M. Newcomer on 25 Dec 2009 22:00 Have you tried? I was not aware that there was any possibility of restricting these so they could not be generated by SendMessage or PostMessage. joe On Thu, 24 Dec 2009 23:30:01 -0800, Mao <Mao(a)discussions.microsoft.com> wrote: >Dear all: > I'm a junior engineer in SW. And now, i try to develop a software to >simulate a touch screen's operation without any touch hardware. In win 7, >these two message, wm_touch and wm_gesture, can't be triggled directly by >SendMessage and PostMessage. So In win7's touch architecture, these messages >can only be triggled by a touch hardware? Or It can be triggled by other win >api and other ways, like driver, to make it true? Joseph M. Newcomer [MVP] email: newcomer(a)flounder.com Web: http://www.flounder.com MVP Tips: http://www.flounder.com/mvp_tips.htm
From: Mao on 26 Dec 2009 00:05 "Note also that the touch input handle in this parameter is no longer valid after the message has been forwarded using PostMessage, SendMessage, or one of their variants. These functions will close and invalidate this handle." Above is the note in the MS MSDN's wm_touch description, and i had tried to directly use postmessage and sendmessage in a button event, just like the below example, MESSAGE_MAP ON_MESSAGE(WM_TOUCH , OnTouch); void XXXX::OnBnClicked() { this->PostMessage(WM_TOUCH , wParam , lParam); } the OnTouch function has also been added in my program, but when the PostMessage transferred the WM_TOUCH message, my onTouch function doestn't be triggled. Furthermore, if i changed the WM_TOUCH to any other Message, like WM_LBUTTONDOWN, the program processing is also correct(onTouch can be triggled). So i think whether the wm_touch message can't be directly triggled if i have no any touch hardware. Or by other ways to triggle these message. Thanks for reply.... -- .... "Joseph M. Newcomer" wrote: > Have you tried? I was not aware that there was any possibility of restricting these so > they could not be generated by SendMessage or PostMessage. > joe
From: Mao on 26 Dec 2009 00:20
"Note also that the touch input handle in this parameter is no longer valid after the message has been forwarded using PostMessage, SendMessage, or one of their variants. These functions will close and invalidate this handle." Above is the note in the MS MSDN's wm_touch description. How to make sure the privilege as the one handling WM_TOUCH? If i have no privilege to handle WM_TOUCH, the privilege how to get? PS: In my program, if i change wm_touch to other messages, like WM_LBUTTONDOWN, the program process can work correctly, but wm_touch can't. -- .... > Why do you say they can't be triggered with PostMessage()? Make sure the > app that is posting has the same privilege as the one handling WM_TOUCH (or > run the poster app As Administrator to be sure). > > -- David > > . > |