Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

Detect keys down on application startup?

Posted on 2010-11-09
11
Medium Priority
?
364 Views
Last Modified: 2012-05-10
Hi,

I have written in C#. I would like the application to start in a "support mode" if the user is holding down Ctrl+Shift+S when the application starts.

As I need to detect the "support mode" keys before the application starts (i.e. the main form loads), I can't do it on the keydown event of the main form. This is because some of the things on the main form get initialised differently in support mode.

I can't find a way of getting the current keys pressed without responding to events.

How can I do this?
0
Comment
Question by:JimR123b
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 6
  • 5
11 Comments
 
LVL 58

Expert Comment

by:cyberkiwi
ID: 34091988
In there, you could set up a singleton GlobalConfig class that contains members that you want to init.
Your main form can then also reference the singleton, e.g. GlobalConfig.GetSingleton.somesetting
0
 

Author Comment

by:JimR123b
ID: 34091998
How do I get the current state of the keys pressed?

0
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

 
LVL 58

Accepted Solution

by:
cyberkiwi earned 1000 total points
ID: 34092057
http://www.switchonthecode.com/tutorials/winforms-accessing-mouse-and-keyboard-state

Ctrl-Shift-S :

if((Control.ModifierKeys == (Keys.Control | Keys.Shift)) && Keyboard.IsKeyDown(Keys.S))
{
  //Do stuff here
}
0
 

Author Comment

by:JimR123b
ID: 34092119
I perhaps should have said, I'm using .Net Framework 3.5.

It appears that the Keyboard class is .Net 4?... http://msdn.microsoft.com/en-us/library/system.windows.input.keyboard.iskeydown.aspx

That's the kind of thing I'm looking for, but for .Net 3.5.

0
 
LVL 58

Expert Comment

by:cyberkiwi
ID: 34092132
Please see the above link.
The class is created in the link, for pre .Net 4.
0
 

Author Comment

by:JimR123b
ID: 34092134
...Also, I can't use Control.ModifierKeys because I don't have a handle on a control yet, as it is needed before the main form is created.
0
 
LVL 58

Expert Comment

by:cyberkiwi
ID: 34092144
Control is a static reference to the Control class, not an instance of a control.
0
 

Author Comment

by:JimR123b
ID: 34092185
Ah, I see. I did try code completion on "Control." to see what came up, and it only came up with a few things, none of which were "ModifierKeys". I've tried it in another class now, and I see "ModifierKeys" :)

...but how do I get the state of Keys.S without the Keyboard class? Is there something similar in Control?

0
 

Author Comment

by:JimR123b
ID: 34092212
Sorry, didn't see the definition of the class Keyboard in http://www.switchonthecode.com/tutorials/winforms-accessing-mouse-and-keyboard-state

0
 
LVL 58

Expert Comment

by:cyberkiwi
ID: 34092215
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction Although it is an old technology, serial ports are still being used by many hardware manufacturers. If you develop applications in C#, Microsoft .NET framework has SerialPort class to communicate with the serial ports.  I needed to…
This article describes a simple method to resize a control at runtime.  It includes ready-to-use source code and a complete sample demonstration application.  We'll also talk about C# Extension Methods. Introduction In one of my applications…
In this video you will find out how to export Office 365 mailboxes using the built in eDiscovery tool. Bear in mind that although this method might be useful in some cases, using PST files as Office 365 backup is troublesome in a long run (more on t…
We’ve all felt that sense of false security before—locking down external access to a database or component and feeling like we’ve done all we need to do to secure company data. But that feeling is fleeting. Attacks these days can happen in many w…

610 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question