How do I prevent multiple HelpProvider windows?

Question

0.00/5 (No votes)

See more:

I'm using HelpProvider in my Windows Form project, and it's working except for the fact that if the user presses F1 multiple times, then multiple instances of the help window are launched. This is not very desirable. Is there a way to prevent multiple help windows, and simply give focus to the one help window if F1 is pressed?

Thanks for any help.

Posted 7-Sep-15 3:34am

Member 11298827

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Member 11298827 · Accepted Answer · 2015-09-07T04:54:00

OK, I found the problem, although I don't understand all. I was using Process.Start(); but then I saw an example using Help.ShowHelp(); This is the event handler for the dropdown help menu (not F1 key), so I don't know why it fixed the F1 key case as well, but it did. The multiple behavior is gone.

C#

private void menuItem6_Click(object sender, System.EventArgs e)
{
    //Process.Start("Flash_Help.chm");
    Help.ShowHelp(this, "Flash_Help.chm");
}