Showing message on Cntrl+Alt+Del screen

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VisualC++

Is there any way to show my application message or any text on Cntrl+alt+del screen.....

Posted 27-Mar-13 7:42am

SNI

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**Zoltán Zörgő** · Answer 1 · 2013-03-27T08:33:00

Solution 2

Sergey is totally right. You still have two options to display some information on logon screen:
1) Use registry to add logon message. See: http://www.techrepublic.com/blog/window-on-windows/adding-messages-to-windows-7s-logon-screen/4390[^]
2) Use logon wallpaper: http://www.techrepublic.com/blog/window-on-windows/change-and-customize-windows-7s-logon-screen-wallpaper/2135[^]

[Update]
I found a really interesting thing for you: http://logonscreenlauncher.codeplex.com/[^]

Posted 27-Mar-13 8:33am

Zoltán Zörgő

Updated 27-Mar-13 21:20pm

v2

Comments

Sergey Alexandrovich Kryukov 27-Mar-13 14:45pm

Good suggestion, my 5.
OP really needs to tell us the ultimate goals.
—SA

Zoltán Zörgő 27-Mar-13 14:47pm

Thank you.
Yes, that would be helpful for us and hem too :)

SNI 28-Mar-13 2:02am

Thanks for all your efforts. But what I am trying is that whenever my application in User Mode received any mesaage and screen is locked then I want to show some notification on cntrl+alt+del screen.

Zoltán Zörgő 28-Mar-13 3:21am

See update!

Sergey Alexandrovich Kryukov · Answer 2 · 2013-03-27T08:27:00

I don't think you can intercept this keyboard input at the level of any user-mode code. I don't know if it can be done in Ring 0 code, but it means the level of the kernel-mode driver or something like that.

This key combination is hidden by the OS from the user-code processes, for apparent safety reasons. If some code blocks Ctrl+Alt+Del, only a reset or power button can help, but its operation can also be blocked in system settings. What else to do then? Only removing the power… :-)

—SA