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Context Help Made Easy

, 2 Feb 2007 CPOL 184.9K 2.2K 271
This article introduces a new way of instrumenting your code that enables help authors associate help topics with the application’s visual contexts at any time - even post-compilation – and to do so using the application’s user interface without the involvement of the developer.
using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace ContextHelpMadeEasy
    static class Program
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        static void Main()
            //add message filter
            MessageFilter oFilter = new MessageFilter();

            Application.Run(new FTestApplication());

    internal class MessageFilter : IMessageFilter
        bool IMessageFilter.PreFilterMessage(ref Message m)
            switch (m.Msg)
                case 0x100: //MSG.WM_KEYDOWN
                    if ((int)m.WParam == (int)Keys.F1)
                        // Call the help handler.
                        return true;
            return false;

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About the Author

Tom Clement
Team Leader
United States United States
I've been programming in C, C++, Visual Basic and C# for almost 30 years. I've worked at Sierra Systems, ViewStar, Mosaix, Lucent, Avaya, Avinon, Apptero and now Serena in various roles over my career.

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