How to set Mouse hook on button click event

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3.00/5 (3 votes)

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In my application I want to set MouseHook on button click event,the hook for mouse move event is set and the output is displayed on listbox but the hook for mouse wheel,mouse down and mouse up is set but output is not displayed on listbox. I don't know the actually reason of it,it is due to code problem or another problem. The code written by me as follow.

public int HookProc(int ncode, int wparam, IntPtr lparam)
		{

			if (ncode >= 0)
			{
				MouseHookStruct mousehookstruct = (MouseHookStruct)Marshal.PtrToStructure(lparam, typeof(MouseHookStruct));
				MouseButtons button = MouseButtons.None;
				short mouseDelta = 0;
				int clickCount = 0;
				bool mouseDown = false;
				bool mouseUp = false;
				switch (wparam)
				{
					case WM_LBUTTONDOWN:
						mouseDown = true;
						button = MouseButtons.Left;
						clickCount = 1;
						break;
					case WM_LBUTTONUP:
						mouseDown = true;
						button = MouseButtons.Left;
						clickCount = 1;
						break;
					case WM_MOUSEWHEEL:
						mouseDelta = (short)((mousehookstruct.MouseData) >> 16 & 0xffff);
						break;

				}

				mousehook6mar.MouseEventExtArgs e = new mousehook6mar.MouseEventExtArgs(button,
													clickCount,
												   mousehookstruct.Point.X,
												   mousehookstruct.Point.Y,
												   mouseDelta);


				if (s_MouseUp != null && mouseUp)
				{
					
						s_MouseUp.Invoke(null, e);
					
				}
					if (s_MouseDown != null && mouseDown)
					{
						
							s_MouseDown.Invoke(null, e);
						
						
					}
					if (s_MouseWheel != null && mouseDelta != 0)
					{
						
							s_MouseWheel.Invoke(null, e);
						
						

					}

please tell me, what is the problem.
Thanks.

Posted 7-Mar-11 17:51pm

Ujwala Gholap

Updated 7-Mar-11 17:53pm

Prerak Patel

v2

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2 solutions

Solution 2

Hi,

have a look at this great CP article that handles mouse and keyboard hooks:
Processing Global Mouse and Keyboard Hooks in C#[^]

Posted 7-Mar-11 19:27pm

JF2015

Comments

Sergey Alexandrovich Kryukov 8-Mar-11 1:31am

The article is valuable, my 5 for the reference. I only don't see why (please see my answer).
--SA

Espen Harlinn 13-Mar-11 8:50am

Good link, my 5

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-03-07T19:25:00

It looks like you're trying to set a mouse hook to capture events in the same process. If you need to capture events from various .NET controls in your process, you never need it. The class System.Windows.Forms.Controls has events MouseClick, MouseEnter, MouseUp, MouseDown, MouseScroll, a complete set of keyboard events and so on. As all the controls of the form form hierarchy, you can recursively visit them all and programmatically add all the event handlers you need. Best thing about this approach is that it is platform-independent (for example, surely works on Linux under Mono).

Alternatively, you can override the methods System.Windows.Forms.Form.DefWndProc to process raw messages. This is less supportable method, not platform-independent.

As to the hook techniques, they are extremely delicate and error prone. I don't see why you may need than. Probably, you could explain that, couldn't you?

—SA