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Posted 23 Jul 2008

Global Mouse and Keyboard Library

, 8 Aug 2008
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Easy-to-use library with global mouse and keyboard hooks and simulators.


This article explains how to use the mouse and keyboard library that I have created. This library consists of two things: global mouse and keyboard hooks, and global mouse and keyboard simulators.

The global hooks contain a set of events that follow the .NET event model, so they should be very simple to use if you've done anything with events before.

The simulators will actually simulate mouse movements, clicks, keyboard presses, etc. This can be useful for macro recording (which is one of the sample projects), and of course, messing with your friends. :)


I've found a lot of hook and simulator code out there, but a lot of it was not very organized, and a bit hard to use. The goal here is to make a very simple and easy-to-use library for mouse and keyboard operations not natively supported by .NET.

Global Hooks

This section will explain how to use the global hooks which can capture mouse and keyboard events from any application. These events are very similar to the ones that appear on Windows controls, so they should look familiar.

Using the mouse hook:

// Create the mouse hook
MouseHook mouseHook = new MouseHook();

// Capture the events
mouseHook.MouseMove += new MouseEventHandler(mouseHook_MouseMove);
mouseHook.MouseDown += new MouseEventHandler(mouseHook_MouseDown);
mouseHook.MouseUp += new MouseEventHandler(mouseHook_MouseUp);
mouseHook.MouseWheel += new MouseEventHandler(mouseHook_MouseWheel); 

// Start watching for mouse events


// Stop watching (don't forget to do this before closing application!)

Using the keyboard hook:

// Create the keyboard hook
KeyboardHook keyboardHook = new KeyboardHook();

// Capture the events
keyboardHook.KeyDown += new KeyEventHandler(keyboardHook_KeyDown);
keyboardHook.KeyUp += new KeyEventHandler(keyboardHook_KeyUp);
keyboardHook.KeyPress += new KeyPressEventHandler(keyboardHook_KeyPress);

// Start watching for keyboard events


// Stop watching (don't forget to do this before closing application!)

Note: When you are setting the events, Visual Studio will name and create a blank method for you. You only need to type this much on the event ...

keyboardHook.KeyDown +=

...and then hit TAB two times. Visual Studio will finish the rest of the line, and will go out and create the blank method for you. This is a nice feature, and saves a lot of time; use it!


This section will explain how to use the the mouse and keyboard simulators to simulate mouse clicks and keyboard key presses. Both the KeyboardSimulator and MouseSimulator classes are static, so they are pretty simple to use.

Simulating mouse events:

// Press Left Mouse Button Down

// Let Left Mouse Button Up

// Press down and Let up Left Mouse Button
// (equivalent to two lines above)

// Double click Left Mouse button
// (equivalent to two Click()s above)

The code above is used to simulate pressing and letting up a certain mouse button. The one parameter is just an enumeration of the three possible mouse buttons: Left, Right, and Middle.

Moving the mouse position:

// Move mouse cursor to Top Left of screen
MouseSimulator.X = 0;
MouseSimulator.Y = 0;

// Move the mouse cursor to the right by 20 pixels
MouseSimulator.X += 20;

The X and Y above are properties. You can use them to get the current position of the mouse cursor, or you can set them to move the mouse cursor to a new location.

Keyboard simulators:

// Press the A Key Down

// Let the A Key back up

// Press A down, and let up (same as two above)

The code above will simulate keyboard key presses. You can press a key down (first line), which doesn't let it up yet. The second line, KeyUp, will release a key that has been pressed down, the third line with do both steps in one shot.

I also included some standard keyboard shortcuts. These can all be done with the code above, but it simplifies it a bit, and makes the code a bit more readable and obvious.

// Simulate (Ctrl + C) shortcut, which is copy for most applications

// This does the same as above

The code above does the exact same thing twice, except the first is a bit shorter and more obvious.

A Sample Application: Global Macro Recorder

A macro recorder is a great example for this library, since we can use the hooks to record the macro, and the simulators to play back.

Check out the Macro project in the downloadable source code.

Future Additions / Revisions

I'm going to edit and add to this library over time as I get feedback. If you think something should be added, changed, or find a problem, please post in the comments section, and I'll do what I can. Thanks. :)

Revision History

  • 7/23/08: Released first version in three versions of .NET.
  • 7/28/08: Added the Application.ApplicationExit event to make sure hooks stop.
  • 8/8/08: Got rid of the debug code in the Macro example, added the MouseWheel method to the MouseSimulator class, and got rid of the duplicate MousePoint class used in MouseSimulator.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Brian Geiman
Software Developer GEA Refrigeration
United States United States
No Biography provided

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Comments and Discussions

GeneralRe: Solve my Problem Please Pin
shfitythrower15-Jan-12 19:43
membershfitythrower15-Jan-12 19:43 
Questionproblem when using with the float data type Pin
irFan9127-Oct-11 21:53
memberirFan9127-Oct-11 21:53 
QuestionCan't run normally in .net4.0 Pin
hambor29-Aug-11 3:24
memberhambor29-Aug-11 3:24 
AnswerRe: Can't run normally in .net4.0 Pin
AuspexPT19-Nov-11 9:40
memberAuspexPT19-Nov-11 9:40 
QuestionUsing this to create a Keyboard Layout Pin
vinodonly8-Aug-11 2:37
membervinodonly8-Aug-11 2:37 
GeneralGreat work Pin
izayoikagami29-Jul-11 6:31
memberizayoikagami29-Jul-11 6:31 
Questionto use this code in .NET 4.0 Pin
BillWoodruff5-Jul-11 18:50
memberBillWoodruff5-Jul-11 18:50 
QuestionHow can I press hotkey Ctrl + C and double click Pin
lampv0120327-Jun-11 6:44
memberlampv0120327-Jun-11 6:44 
I got have two problem:
first: Press multiple hotkey "Ctrl + C". I set

void keyboardHook_KeyDown(object sender, KeyEventArgs e)
    if (e.Control && e.KeyCode == Keys.C)

I want to copy text with "Ctrl + C" and show this text without form. But it doesn't work.

the second: I want to double click to select a text and show that text selected (of couse without form). But I Don't know how? ^^... It like some path of dictionary software. Can you write an example about it?
GeneralIt's not work! Pin
rakkang18-Jun-11 2:20
memberrakkang18-Jun-11 2:20 
GeneralRe: It's not work! Pin
outerhell27-Jan-14 23:44
memberouterhell27-Jan-14 23:44 
GeneralMy vote of 5 Pin
jo le serb18-Jun-11 0:59
memberjo le serb18-Jun-11 0:59 
QuestionCan I use this library in Pin
Manindra293-May-11 23:18
memberManindra293-May-11 23:18 
GeneralMy vote of 2 Pin
charles henington19-Apr-11 11:22
membercharles henington19-Apr-11 11:22 
GeneralRe: My vote of 2 Pin
jacob_suibowen3-May-11 13:22
memberjacob_suibowen3-May-11 13:22 
GeneralRe: My vote of 2 Pin
evolaz19-May-11 3:46
memberevolaz19-May-11 3:46 
GeneralRe: My vote of 2 Pin
Aamir Butt3-Sep-11 7:20
memberAamir Butt3-Sep-11 7:20 
QuestionHow to stop play events Pin
StreetMan17-Apr-11 20:34
memberStreetMan17-Apr-11 20:34 
AnswerRe: How to stop play events Pin
charles henington18-Apr-11 11:50
membercharles henington18-Apr-11 11:50 
GeneralMy vote of 5 Pin
Ali Al Omairi(Abu AlHassan)13-Apr-11 19:58
memberAli Al Omairi(Abu AlHassan)13-Apr-11 19:58 
GeneralMy vote of 1 Pin
Ali Al Omairi(Abu AlHassan)13-Apr-11 4:46
memberAli Al Omairi(Abu AlHassan)13-Apr-11 4:46 
GeneralRe: My vote of 1 Pin
charles henington13-Apr-11 5:18
membercharles henington13-Apr-11 5:18 
GeneralRe: My vote of 1 Pin
Ali Al Omairi(Abu AlHassan)13-Apr-11 19:56
memberAli Al Omairi(Abu AlHassan)13-Apr-11 19:56 
GeneralOutstanding Pin
David H Robertson10-Apr-11 3:05
memberDavid H Robertson10-Apr-11 3:05 
QuestionHow to save macros in file???? [modified] Pin
StreetMan31-Mar-11 3:28
memberStreetMan31-Mar-11 3:28 
AnswerRe: How to save macros in file???? Pin
charles henington13-Apr-11 5:29
membercharles henington13-Apr-11 5:29 

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