Mouse Hook using c#

/* I have used three classes to do this */

public class WindowsHookHelper

{

public delegate IntPtr HookDelegate(

Int32 Code, IntPtr wParam, IntPtr lParam);

[DllImport("User32.dll")]

public static extern IntPtr CallNextHookEx(

IntPtr hHook, Int32 nCode, IntPtr wParam, IntPtr lParam);

[DllImport("User32.dll")]

public static extern IntPtr UnhookWindowsHookEx(IntPtr hHook);

[DllImport("User32.dll")]

public static extern IntPtr SetWindowsHookEx(

int idHook, HookDelegate lpfn, IntPtr hmod,

int dwThreadId);

}

// ------------------------------------------------------------------------------------------------------------------------------------------------//

public class MouseInput : IDisposable

{

public event EventHandler MouseMoved;

public event EventHandler MouseClicked;

private readonly WindowsHookHelper.WindowsHookHelper.HookDelegate _mouseDelegate;

private IntPtr _mouseHandle;

private const Int32 WH_MOUSE_LL = 14;

private bool _disposed;

public MouseInput()

{

_mouseDelegate = MouseHookDelegate;

_mouseHandle = WindowsHookHelper.WindowsHookHelper.SetWindowsHookEx(WH_MOUSE_LL, _mouseDelegate, IntPtr.Zero, 0);

}

private IntPtr MouseHookDelegate(int code, IntPtr wParam, IntPtr lParam)

{

try

{

if (MouseMoved != null && MouseClicked != null)

{

if (code < 0)

return WindowsHookHelper.WindowsHookHelper.CallNextHookEx(_mouseHandle, code, wParam, lParam);

if (wParam == (IntPtr)0x0200)

MouseMoved(this, new EventArgs());

else if (wParam == (IntPtr)0x0201 || wParam == (IntPtr)0x0203 || wParam == (IntPtr)0x0204 || wParam == (IntPtr)0x0206 || wParam == (IntPtr)0x0209 || wParam == (IntPtr)0x0207)

MouseClicked(this, new EventArgs());

return WindowsHookHelper.WindowsHookHelper.CallNextHookEx(_mouseHandle, code, wParam, lParam);

}

return WindowsHookHelper.WindowsHookHelper.CallNextHookEx(_mouseHandle, code, wParam, lParam);

}

catch (Exception exception)

{

return WindowsHookHelper.WindowsHookHelper.CallNextHookEx(_mouseHandle, code, wParam, lParam);

}

public void Dispose()

{

Dispose(true);

}

protected virtual void Dispose(bool disposing)

{

if (!_disposed)

{

if (_mouseHandle != IntPtr.Zero)

WindowsHookHelper.WindowsHookHelper.UnhookWindowsHookEx(_mouseHandle);

_disposed = true;

}

~MouseInput()

{

Dispose(false);

}

//------------------------------------------------------------------------------------------------------------------------------------------------//

public class GetMouse

{

private MouseInput.MouseInput _mouse;

[DllImport("user32.dll")]

private static extern IntPtr GetForegroundWindow();

[DllImport("user32.dll")]

private static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count);

[DllImport("user32")]

public static extern IntPtr GetDesktopWindow();

GetMouse()

{

_mouse = new MouseInput.MouseInput();

}

public void GetMouseEvent(object sender, DoWorkEventArgs e)

{

_mouse.MouseMoved += MouseMoved;

_mouse.MouseClicked += MouseClicked;

}

private void MouseMoved(object sender, EventArgs e)

{

Console.WriteLine("Mouse moved");

}

private void MouseClicked(object sender, EventArgs e)

{

Console.WriteLine("Mouse clicked");

}

6 Replies

Know the answer? Post it — somebody with the same question will find it here.

Praneeth Salukooti6y ago
I have done all that is in tweaks but it is not working, getting the same issue
Amit Gupta6y ago
WPF will cause a lot of performance issues unless you handle it wisely. eg if you use your control under lots of tree structures then it will damm irritate the user.

Try changing the layout or use the project in a simple layout form.

Have a read of usage and tweaks that might be helpful
https://stackoverflow.com/questions/27133957/global-mouse-hook-in-wpf/27151607
Praneeth Salukooti6y ago
Thank you, for the solution, it is working fine. But when I have included this solution in WPF application and integrated it into that application, it is raising the same issue..
Amit Gupta6y ago
Here's the sample application demo. Do try https://www.codeproject.com/Articles/7294/Processing-Global-Mouse-and-Keyboard-Hooks-in-C
Praneeth Salukooti6y ago
/* I have used three classes to do this */

public class WindowsHookHelper
{
public delegate IntPtr HookDelegate(
Int32 Code, IntPtr wParam, IntPtr lParam);
[DllImport("User32.dll")]
public static extern IntPtr CallNextHookEx(
IntPtr hHook, Int32 nCode, IntPtr wParam, IntPtr lParam);
[DllImport("User32.dll")]
public static extern IntPtr UnhookWindowsHookEx(IntPtr hHook);
[DllImport("User32.dll")]
public static extern IntPtr SetWindowsHookEx(
int idHook, HookDelegate lpfn, IntPtr hmod,
int dwThreadId);
}

// ------------------------------------------------------------------------------------------------------------------------------------------------//

public class MouseInput : IDisposable
{
public event EventHandler MouseMoved;
public event EventHandler MouseClicked;
private readonly WindowsHookHelper.WindowsHookHelper.HookDelegate _mouseDelegate;
private IntPtr _mouseHandle;
private const Int32 WH_MOUSE_LL = 14;
private bool _disposed;
public MouseInput()
{
_mouseDelegate = MouseHookDelegate;
_mouseHandle = WindowsHookHelper.WindowsHookHelper.SetWindowsHookEx(WH_MOUSE_LL, _mouseDelegate, IntPtr.Zero, 0);
}
private IntPtr MouseHookDelegate(int code, IntPtr wParam, IntPtr lParam)
{
try
{
if (MouseMoved != null && MouseClicked != null)
{
if (code < 0)
return WindowsHookHelper.WindowsHookHelper.CallNextHookEx(_mouseHandle, code, wParam, lParam);
if (wParam == (IntPtr)0x0200)
MouseMoved(this, new EventArgs());
else if (wParam == (IntPtr)0x0201 || wParam == (IntPtr)0x0203 || wParam == (IntPtr)0x0204 || wParam == (IntPtr)0x0206 || wParam == (IntPtr)0x0209 || wParam == (IntPtr)0x0207)
MouseClicked(this, new EventArgs());
return WindowsHookHelper.WindowsHookHelper.CallNextHookEx(_mouseHandle, code, wParam, lParam);
}
return WindowsHookHelper.WindowsHookHelper.CallNextHookEx(_mouseHandle, code, wParam, lParam);
}
catch (Exception exception)
{
return WindowsHookHelper.WindowsHookHelper.CallNextHookEx(_mouseHandle, code, wParam, lParam);
}
}
public void Dispose()
{
Dispose(true);
}
protected virtual void Dispose(bool disposing)
{
if (!_disposed)
{
if (_mouseHandle != IntPtr.Zero)
WindowsHookHelper.WindowsHookHelper.UnhookWindowsHookEx(_mouseHandle);
_disposed = true;
}
}
~MouseInput()
{
Dispose(false);
}
}

//------------------------------------------------------------------------------------------------------------------------------------------------//

public class GetMouse
{
private MouseInput.MouseInput _mouse;

[DllImport("user32.dll")]
private static extern IntPtr GetForegroundWindow();
[DllImport("user32.dll")]
private static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count);
[DllImport("user32")]
public static extern IntPtr GetDesktopWindow();

GetMouse()
{
_mouse = new MouseInput.MouseInput();
}

public void GetMouseEvent(object sender, DoWorkEventArgs e)
{
_mouse.MouseMoved += MouseMoved;
_mouse.MouseClicked += MouseClicked;
}

private void MouseMoved(object sender, EventArgs e)
{
Console.WriteLine("Mouse moved");
}

private void MouseClicked(object sender, EventArgs e)
{
Console.WriteLine("Mouse clicked");
}

}
Amit Gupta6y ago
Hey

Please share your code, so that we can identify it