如何检查程序是否被使用？

Question

I need to close the application (C#) when user doesn't use it - let's say that when there is no Click event on any form of the program (there are about 100 forms). Is there any way to do that without handling Click even on each form of the app. (I have the thread running each minute, where it could be checked)? Thanks in advance!

Answer 1

You can hook into the application message loop using the Application.AddMessageFilter function. Write a message filter that inspects all mouse click messages and/or keyboard messages, or anything you're interested in.

For instance:

public class DetectActivityMessageFilter : IMessageFilter
{
    private const int WM_LBUTTONDOWN = 0x0201;

    public bool PreFilterMessage(ref Message m)
    {
        if (m.Msg == WM_LBUTTONDOWN)
        {
            // The left mouse button was pressed
        }

        return false;
    }
}