Creating a Simple Key Logger in C#

Written By: Dragos Nicholas

- 13 Sep 2008 -

Description: Learn how to program a simple key logger with the help of C# and the .NET Framework. And that's not all, it saves the keystrokes into a file and periodically sends the file as an email attachment.

Creating the Project
Running the Key Logger at Windows Startup
You've Got Mail
Intercepting Keystrokes
The HookCallback Method
API Methods
Possible Errors

Possible Errors

All you have to do is put together, one by one, the above blocks of code.

Some possible errors might occur:

if you see the console, then go to the project Properties and select Windows Application
you haven't added the System.Windows.Forms reference
you haven't disposed of the message attachement (data.Dispose())
you haven't closed the streamwriter (sw.Dispose())

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