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Ban Ctrl+V

 
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Ban Ctrl+V
RomTibi
19 Jan, 2008 - 03:22 AM
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How can I ban the use of Ctrl+V key combination to avoid the use of RASTE in EditBoxes? In VC6++, please
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Tom9729
RE: Ban Ctrl+V
19 Jan, 2008 - 12:10 PM
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Why would you want to do that?
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RomTibi
RE: Ban Ctrl+V
20 Jan, 2008 - 12:42 AM
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The reason could be: to prevent saving sensitive data (passwords, etc.) locally, into a file, for easy copy-paste into the application. It's easier to steal secrets with the computer.
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no2pencil
RE: Ban Ctrl+V
20 Jan, 2008 - 12:49 AM
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QUOTE(RomTibi @ 20 Jan, 2008 - 01:42 AM) *

The reason could be: to prevent saving sensitive data (passwords, etc.) locally, into a file, for easy copy-paste into the application. It's easier to steal secrets with the computer.

Make a windows registry hook & search the keystrokes for that key combination. If it matches, don't return that value to the process.
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born2c0de
RE: Ban Ctrl+V
20 Jan, 2008 - 07:42 AM
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You don't need to do anything of that sort when you can use a simple technique.

Use the TextChanged() or Changed() (I'm not sure which one) Event and compare the length of the newly entered text with that of the previous value.

If the length has increased or decreased by 1, it means that the user has either entered a character or pressed backspace.

If the length has decreased by more than 1, it means that the user has selected a couple of characters and pressed delete.

If the length has increased by more than 1, it's a copy-paste operation. If this case is true, ignore the new text and if required, change the contents of the textbox back to its original value.
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Tom9729
RE: Ban Ctrl+V
20 Jan, 2008 - 08:51 PM
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If the information is on the computer, then the user can get at it. I'm not one to squash people's ideas on here, but I think the chance of someone "copying and pasting" sensitive information is trivial. If they can't be trusted to not duplicate the information, then they shouldn't be trusted with it in the first place.
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