CODEWITHSUNDEEP
c#winforms
Spidermain50
Spidermain50

Reputation: 689

C# Application-Wide Left Mouse Click Event

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?

Upvotes: 4

Views: 4102

Answers (4)

A.Gerailly
A.Gerailly

Reputation: 1

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

Using For Vb Or Vba

Upvotes: 0

Hans Passant
Hans Passant

Reputation: 941218

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.

Upvotes: 8

L.B
L.B

Reputation: 116098

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);
}

Upvotes: 4

MusiGenesis
MusiGenesis

Reputation: 75296

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.

Upvotes: 0

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