Select Search automatically for updated driver software. Select Update Driver. If Windows doesn't find a new driver, you can try looking for one on the device manufacturer's website and follow their instructions. Reinstall the device driver. In the search box on the taskbar, enter device manager, then select Device Manager. Microsoft Windows 10 STIG Benchmark - Ver 2, Rel 1 100.2 KB 02 Dec 2020 Microsoft Windows Server 2012 and 2012 R2 DC STIG Benchmark - Ver 3. As long as the client does not use SCAPS Software for commercial purposes, but only for purposes of presentation or evaluation, he is entitled to download, copy and install a demo version of SCAPS Software, which at the sole discretion of SCAPS can contain functions of the full version by granting a password for a limited period, without.-->
By Mark Russinovich
Published: November 1, 2006
Download Ctrl2Cap(48 KB)
Ctrl2cap is a kernel-mode device driver that filters the system'skeyboard class driver in order to convert caps-lock characters intocontrol characters. People like myself that migrated to NT from UNIX areused to having the control key located where the caps-lock key is on thestandard PC keyboard, so a utility like this is essential for ourediting well-being.
Installation and Use
Install Ctrl2cap running the command 'ctrl2cap /install' from thedirectory into which you've unzipped the Ctrl2cap files. To uninstalltype 'ctrl2cap /uninstall'.
How Ctrl2cap Works
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On NT 4 Ctrlcap is actually quite trivial. It simply attaches itself tothe keyboard class driver so that it will catch keyboard read requests.For each request, it posts an I/O completion callback, at which point ittakes a peek at the scancode that is being returned. If it happens to bea caps-lock, ctrl2cap changes it into a left-control.
On Win2K Ctrl2cap is a WDM filter driver that layers in the keyboardclass device's stack above the keyboard class device. This is incontrast to the Win2K DDK's kbfiltr example that layers itself betweenthe i8042 port device and the keyboard class device. I chose to layer ontop of the keyboard class device for several reasons:
- It means that the Ctrl2cap IRP_MJ_READ interception andmanipulation code is shared between the NT 4 and Win2K versions.
- I don't need to supply an INF file and have the user go through theDevice Manager to install Ctrl2cap - I simply modify the appropriateRegistry value (the keyboard class devices'sHKLMSystemCurrentControlSetControlClass UpperFilters value).
The disadvantage of my approach is (and this an advantage ordisadvantage depending on your point of view):
- Because I don't install with an INF file via the Device Manager, theuser is not warned that the Ctrl2cap driver file is not digitallysigned by Microsoft.
In this particular case, I felt that the advantages outweigh thedisadvantages. However, before you model a Win2K keyboard filter onCtrl2cap I strongly suggest that you study the kbfiltr example from theWin2K DDK. Kbfiltr's interception point in the key input sequence makesit very easy for kbfiltr to inject keystrokes into the input stream.
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For more information on writing filter drivers (drivers that attachthemselves to other drivers so that they can see their input and/oroutput), here are sources to check out:
- The Windows NT and Windows 2000 DDK samplesrcstoragefilterdiskperf
- The Windows 2000 DDK sample srcinputkbfiltr
- 'Examining the Windows NT File System,' By Mark Russinovich, Dr.Dobb's Journal, February 1997
- The accompanying file system filter driver,Filemon
Download Ctrl2Cap(48 KB)
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- Client: Windows Vista and higher.
- Server: Windows Server 2008 and higher.