c# & GetAsyncKeyState() - How to check all keys?

Question

This code

for (int i = 0; i < 256; i++)
{
    if (GetAsyncKeyState(i) == -32767)
    {
        MessageBox.Show(i.ToString());
    }
}

excludes i.e. function keys (F1, F2, and so on) or numpad keys.

What do I need to do, to make this code work for all keys?

Thanks in advance.

have you looked at [Keys enum](https://msdn.microsoft.com/en-us/library/system.windows.forms.keys(v=vs.110).aspx)? — Gabriel GM, Sep 12 '16 at 02:33
@GabrielGM Yes, I did. But there are no values which I could use to save the key in an *.ini File. — Reese, Sep 12 '16 at 06:06
Not quite sure I understand what you mean by an ini file.. Loop with a [foreach](http://stackoverflow.com/questions/105372/how-do-i-enumerate-an-enum)? — Gabriel GM, Sep 12 '16 at 13:06
Yes, maybe I explained it badly. I want to customize the user's hotkeys within the program. I think, I can save the Key Codes of all Keys as integer into an ini file. To ask the user for a key I want to take a textbox. Within this textbox the user should be able to but any key. Normal keys like letters are not the problem, but how do I detect the F1 to F12 keys and how to save them into an ini file? Thanks in advance. — Reese, Sep 12 '16 at 14:12
F1 to F12 are also represented by int in the enum (see http://referencesource.microsoft.com/#System.Windows.Forms/winforms/Managed/System/WinForms/Keys.cs,c9ea55b52b93f5c4) — Gabriel GM, Sep 12 '16 at 14:43

score 1 · Accepted Answer · edited May 23 '17 at 12:32

1

For further reference:

You should use Keys enum. You can use Foreach on Enum.

Keys enum is an integer, so you can reference it by it's number later on.

edited May 23 '17 at 12:32

Community

answered Sep 12 '16 at 16:50

Gabriel GM

1 Answers1