1. Cool WinAPI procedure, check it out!
- Posted by "William Heimbigner" <icxcnika at hotpop.com> Sep 14, 2004
- 446 views
The blockInput procedure blocks keyboard and mouse input events from reaching applications. The code for it is as follows:
include win32lib.ew constant xBlockInput=registerw32Procedure(user32,"BlockInput",{C_INT}) global procedure blockInput(atom fBlockIt) --1 for block, 0 for unblock w32Proc(xBlockInput,{fBlockIt}) end procedure
Remarks: When input is blocked, real physical input from the mouse or keyboard will not affect the input queue's synchronous key state (reported by GetKeyState and GetKeyboardState), nor will it affect the asynchronous key state (reported by GetAsyncKeyState). However, the thread that is blocking input can affect both of these key states by calling SendInput. No other thread can do this. The system will unblock input in the following cases: The thread that blocked input unexpectedly exits without calling BlockInput with fBlock set to FALSE. In this case, the system cleans up properly and re-enables input. <li>Windows 95/98/Me: The system displays the Close Program/Fault dialog box. This can occur if the thread faults or if the user presses CTRL+ALT+DEL. <li>Windows 2000/XP: The user presses CTRL+ALT+DEL or the system invokes the Hard System Error modal message box (for example, when a program faults or a device fails). William Heimbigner icxcnika at hotpop.com Visit the UBoard - Forceful Signups Removed! - http://uboard.proboards32.com - Threaded discussion, improved searching, human moderating, graphical smileys, better formatting abilities (now what else was there...) Visit my website: http://www.geocities.com/icxcnika123
2. Re: Cool WinAPI procedure, check it out!
- Posted by Derek Parnell <ddparnell at bigpond.com> Sep 14, 2004
- 439 views
William Heimbigner wrote: > > The blockInput procedure blocks keyboard and mouse input events from > reaching applications. And why is this a useful thing to do? -- Derek Parnell Melbourne, Australia
3. Re: Cool WinAPI procedure, check it out!
- Posted by irv mullins <irvm at ellijay.com> Sep 14, 2004
- 417 views
William Heimbigner wrote: > > The blockInput procedure blocks keyboard and mouse input events from > reaching applications. Why bother to code this function into our apps when Windows does this automatically at least once or twice a day? Irv
4. Re: Cool WinAPI procedure, check it out!
- Posted by "Juergen Luethje" <j.lue at gmx.de> Sep 14, 2004
- 416 views
Irv Mullins wrote: > William Heimbigner wrote: >> >> The blockInput procedure blocks keyboard and mouse input events from >> reaching applications. > > Why bother to code this function into our apps when Windows does > this automatically at least once or twice a day? *ROTFL* Irv, got you there! It seems that you admit, that Windows sometimes does something, that Linux doesn't do. Regards, Juergen -- /"\ ASCII ribbon campain | Money is the root of all evil. \ / against HTML in | Send 20 Dollars for more info. X e-mail and news, | / \ and unneeded MIME | http://home.arcor.de/luethje/prog/
5. Re: Cool WinAPI procedure, check it out!
- Posted by "William Heimbigner" <icxcnika at hotpop.com> Sep 14, 2004
- 465 views
----- Original Message ----- From: "Juergen Luethje" <j.lue at gmx.de> To: <EUforum at topica.com> Sent: Tuesday, September 14, 2004 9:25 AM Subject: Re: Cool WinAPI procedure, check it out! > > > Irv Mullins wrote: > > > William Heimbigner wrote: > >> > >> The blockInput procedure blocks keyboard and mouse input events from > >> reaching applications. > > > > Why bother to code this function into our apps when Windows does > > this automatically at least once or twice a day? > > *ROTFL* > Yah, me 2. Quite right infact. The point of this is if you have a critical operation, you can lock the mouse to prevent some problems. Besides: you shouldn't ask me that question. Ask microsoft for the point of this function. ... I bet $1 microbucks they will answer: to allow applications to temporarily block input. William Heimbigner icxcnika at hotpop.com Visit the UBoard - Forceful Signups Removed! - http://uboard.proboards32.com - Threaded discussion, improved searching, human moderating, graphical smileys, better formatting abilities (now what else was there...) Visit my website: http://www.geocities.com/icxcnika123
6. Re: Cool WinAPI procedure, check it out!
- Posted by irv mullins <irvm at ellijay.com> Sep 14, 2004
- 435 views
William Heimbigner wrote: > Yah, me 2. Quite right infact. > The point of this is if you have a critical operation, you can lock the > mouse to prevent some problems. Besides: you shouldn't ask me that question. > Ask microsoft for the point of this function. > ... > I bet $1 microbucks they will answer: to allow applications to temporarily > block input. Maybe it's useful so Windows doesn't have to handle interrupts from the mouse/keyboard while doing something else. Irv