C# Application-Wide Left Mouse Click Event

Question

I want to play a sound when the left mouse button is clicked anywhere in my form without having to place Mouse click events on every single control in the form. Is there a way to accomplish this?

Consider looking at WPF instead of WinForms. WPF events are automatically bubbled up to parent controls, so this would be trivial. — Joe White, Oct 28 '11 at 21:13

score 7 · Accepted Answer · answered Oct 28 '11 at 21:09

You can detect the Windows notification before it is dispatched to the control with the focus with the IMessageFilter interface. Make it look similar to this:

public partial class Form1 : Form, IMessageFilter {
    public Form1() {
        InitializeComponent();
        Application.AddMessageFilter(this);
        this.FormClosed += delegate { Application.RemoveMessageFilter(this); };
    }

    public bool PreFilterMessage(ref Message m) {
        // Trap WM_LBUTTONDOWN
        if (m.Msg == 0x201) {
            System.Diagnostics.Debug.WriteLine("BEEP!");
        }
        return false;
    }
}

This works for any form in your project, not just the main one.

Awesome! Thank you! Oh and the value for the left mouse button for me was `m.Msg == 0x0201` — Spidermain50, Nov 01 '11 at 20:37

score 3 · Answer 2 · answered Oct 28 '11 at 21:06

3

This should do the trick

const int WM_PARENTNOTIFY = 0x210;
const int WM_LBUTTONDOWN = 0x201;

protected override void WndProc(ref Message m)
{
    if (m.Msg == WM_LBUTTONDOWN || (m.Msg == WM_PARENTNOTIFY && (int)m.WParam == WM_LBUTTONDOWN)) 
         DoIt();
    base.WndProc(ref m);
}

answered Oct 28 '11 at 21:06

L.B

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Awesome beans. Been searching ages for this + sooo simple. Cheers dude. – stigzler Jan 13 '18 at 13:00

A.Gerailly · Answer 3 · 2019-05-02T14:42:36.990

0

Case WM_PARENTNOTIFY Select Case Wparam Case 513 ' WM_LBUTTODOWN PlaySoundA End Select

Using For Vb Or Vba

edited May 02 '19 at 14:42

answered May 02 '19 at 11:50

A.Gerailly

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4

score 0 · Answer 4 · answered Oct 28 '11 at 20:53

0

This project may be overkill for your needs (since it hooks global mouse events, not just ones on your form), but I think it shows the basics of what you need.

answered Oct 28 '11 at 20:53

MusiGenesis

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It's useful occasionally to globally hook mouse or keyboard... but never hook globally what you can process locally. – Jason Williams Oct 28 '11 at 21:57

C# Application-Wide Left Mouse Click Event

4 Answers4

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