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Keyboard Buffer in Windows

Posted on 1998-07-13
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Last Modified: 2013-12-03
How can I find the keyboard buffer in the memory for Windows 95/NT.
I would like to write an application with a timer, it can write something to
keyboard buffer directly without typing any key. I know how to implement it
under DOS. I found that it was different under windows.
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Question by:hbh
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4 Comments
 

Accepted Solution

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FabMan earned 200 total points
ID: 1410010
You don't necessarily have to write data directly into the keyboard buffer, as you would do in a DOS program. The best way is to change paradigms. Try sending messages WM_KEYUP and WM_KEYDOWN (and WM_SYSKEYUP and WM_SŸSKEYDOWN) to the window you wish to send keyboard input. If you don't know exactly what window it is, maybe you can use functions like GetLastActivePopup() or FindWindow() or FindWindowEx() to help you out.

Good luck!
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Author Comment

by:hbh
ID: 1410011
My purpose is to write a program and let it run in background mode. This program can be registed in
HKEY_LOCAL_MACHINE,
"SOFTWARE/Microsoft/Windows/CurrentVersion/RunServices"
so it can be loaded by the system before logon.
I would like to let this program give the password in login dialog box instead of enter
possword on keyboard.
Any good suggestion?
hbh
0
 

Author Comment

by:hbh
ID: 1410012
My purpose is to write a program and let it run in background mode. This program can be registed in
HKEY_LOCAL_MACHINE,
"SOFTWARE/Microsoft/Windows/CurrentVersion/RunServices"
so it can be loaded by the system before logon.
I would like to let this program give the password in login dialog box instead of enter
possword on keyboard.
Any good suggestion?
hbh
0
 
LVL 22

Expert Comment

by:nietod
ID: 1410013
In general (not always) The best way to "fake" keystrokes is to use the keybd_event() procedure.  It tends to be simpler and better behaved than sending key messages.
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