please dont rip this site Prev Next

AttachThreadInput info  Overview  Group

The AttachThreadInput function attaches the input processing mechanism of one thread to that of another thread.

BOOL AttachThreadInput(

    DWORD idAttach,

// thread to attach

    DWORD idAttachTo,

// thread to attach to

    BOOL fAttach 

// attach or detach

   );

Parameters

idAttach
Specifies the identifier of the thread to be attached to another thread. The thread to be attached cannot be a system thread.
idAttachTo
Specifies the identifier of the thread to be attached to. This thread cannot be a system thread.

A thread cannot attach to itself. Therefore, idAttachTo cannot equal idAttach.

fAttach
Specifies whether to attach or detach the threads. If this parameter is TRUE, the two threads are attached. If the parameter is FALSE, the threads are detached.

Return Values

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. There is no extended error information; do not call GetLastError.

Remarks

Windows created in different threads typically process input independently of each other. That is, they have their own input states (focus, active, capture windows, key state, queue status, and so on), and they are not synchronized with the input processing of other threads. By using the AttachThreadInput function, a thread can attach its input processing to another thread. This also allows threads to share their input states, so they can call the SetFocus function to set the keyboard focus to a window of a different thread. This also allows threads to get key-state information. These capabilities are not generally possible.

The AttachThreadInput function fails if either of the specified threads does not have a message queue. The system creates a thread's message queue when the thread makes its first call to one of the Win32 USER or GDI functions. The AttachThreadInput function also fails if a journal record hook is installed. Journal record hooks attach all input queues together.

Note that key state, which can be ascertained by calls to the GetKeyState or GetKeyboardState function, is reset after a call to AttachThreadInput.

Windows NT: You cannot attach a thread to a thread in another desktop.

See Also

GetCurrentThreadId, GetKeyState, GetKeyboardState, GetWindowThreadProcessId, SetFocus 


file: /Techref/os/win/api/win32/func/src/f03_1.htm, 4KB, , updated: 2000/4/7 11:19, local time: 2024/11/6 19:38,
TOP NEW HELP FIND: 
44.192.67.10:LOG IN
©2024 PLEASE DON'T RIP! THIS SITE CLOSES OCT 28, 2024 SO LONG AND THANKS FOR ALL THE FISH!

 ©2024 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE!

<A HREF="http://www.piclist.com/techref/os/win/api/win32/func/src/f03_1.htm"> AttachThreadInput</A>

After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type a nice message (short messages are blocked as spam) in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.


Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?

  PICList 2024 contributors:
o List host: MIT, Site host massmind.org, Top posters @none found
- Page Editors: James Newton, David Cary, and YOU!
* Roman Black of Black Robotics donates from sales of Linistep stepper controller kits.
* Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters.
* Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated!
* Contributors: Richard Seriani, Sr.
 

Welcome to www.piclist.com!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .