On-Screen keyboard: how is it done?
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From: Polaris on 10 May 2008 14:14 Hi Experts: I saw an PC without keyboard attached, it uses an on-screen keyboard software program. When user clicks on a "key" (a button) on the program, the program can find the currently active (focused) window application (for example, notepad.exe) and input "typed" key into that active program; but the keyboard program itself seems did not get activated while user click on a button on it. I could not figure out how it is accomplished? How does the keyboard program avoid getting focus (active) even when user click on a "key" button of the program? It must be able to do so in order to find the currently active Windows program that user is working with (etc, a notepad.exe). Thanks for your thoughts in advance. Polaris
From: Marcin Hoppe on 10 May 2008 14:40 Polaris pisze: > Thanks for your thoughts in advance. What I'd do if I were you and didn't want to buy an off-the-shelf product (like itKeyboard from http://www.touch-soft.com/) would be to download a trial version of an off-the-shelf product and use Spy++ to look at messages that it sends and receives. Best regards! -- Marcin Hoppe Email: marcin.hoppe(a)gmail.com Blog: http://devlicio.us/blogs/marcin_hoppe
From: Scott Seligman on 10 May 2008 14:45 "Polaris" <etpolaris(a)hotmail.com> wrote: > >I could not figure out how it is accomplished? How does the keyboard program >avoid getting focus (active) even when user click on a "key" button of the >program? It must be able to do so in order to find the currently active >Windows program that user is working with (etc, a notepad.exe). The window has the WS_EX_NOACTIVATE extended window style set. -- --------- Scott Seligman <scott at <firstname> and michelle dot net> --------- The universe is driven by the complex interaction between three ingredients: matter, energy, and enlightened self-interest. -- G'Kar in Babylon 5:"Survivors"
From: David Ching on 10 May 2008 16:44 "Scott Seligman" <seligman(a)example.com> wrote in message news:g04qfi$s1e$1(a)panix3.panix.com... > The window has the WS_EX_NOACTIVATE extended window style set. > Very cool... I had not known about this style. Before Win2K, the way to do it was to intercept WM_MOUSEACTIVATE and return MA_NOACTIVATE (or MA_NOACTIVATEANDEAT). -- David
From: clintonG on 11 May 2008 13:10
Go look around http://www.codeproject.com/ "Polaris" <etpolaris(a)hotmail.com> wrote in message news:OSU6wmssIHA.3716(a)TK2MSFTNGP04.phx.gbl... > Hi Experts: > > I saw an PC without keyboard attached, it uses an on-screen keyboard > software program. When user clicks on a "key" (a button) on the program, > the program can find the currently active (focused) window application > (for example, notepad.exe) and input "typed" key into that active program; > but the keyboard program itself seems did not get activated while user > click on a button on it. > > I could not figure out how it is accomplished? How does the keyboard > program avoid getting focus (active) even when user click on a "key" > button of the program? It must be able to do so in order to find the > currently active Windows program that user is working with (etc, a > notepad.exe). > > Thanks for your thoughts in advance. > Polaris > > > |