Handle the KeyDown Event when ALT+KEY is Pressed

Question

How do you handle a KeyDown event when the ALT key is pressed simultaneously with another key in .NET?

score 7 · Answer 1 · answered Jan 27 '10 at 13:10

7

The KeyEventArgs class defines several properties for key modifiers - Alt is one of them and will evaluate to true if the alt key is pressed.

answered Jan 27 '10 at 13:10

Oded

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score 5 · Answer 2 · answered Jan 27 '10 at 13:33

5

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.Alt && e.KeyData != (Keys.RButton | Keys.ShiftKey | Keys.Alt))
    {
        // ...
    }
}

answered Jan 27 '10 at 13:33

kor_

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score 2 · Answer 3 · answered Jan 27 '10 at 13:06

2

Something like:

   private void Form1_KeyDown(object sender, KeyEventArgs e)
   {
        if (e.Alt)
        {
            e.Handled = true;
            // ,,,
        }
    }

answered Jan 27 '10 at 13:06

H H

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2

The problem is that I get only the Alt key not the Key press with the ALT – Jedi Master Spooky Jan 27 '10 at 13:11
@Jedi, you're supposed to get (separate) events for both. – H H Jan 27 '10 at 14:15

score 2 · Accepted Answer · answered Jan 27 '10 at 13:32

2

This is the code that finally Works

if (e.KeyCode >= Keys.A && e.KeyCode <= Keys.Z &&  e.Alt){
     //Do SomeThing
}

answered Jan 27 '10 at 13:32

Jedi Master Spooky

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how will your spanish and french users like this? – No Refunds No Returns Jan 27 '10 at 13:36
Do the special characters in non-English languages (e.g ê) fall between key codes A-Z? I think the answer is no, but not certain. Sorry to bump an old post but I just stumbled upon it. – XtrmJosh Jan 30 '14 at 21:04
3

You mean English people don't use digit and punctuation? Seriously, this answer is not correct - almost every other are. – Benlitz Dec 11 '14 at 06:53

score 0 · Answer 5 · answered Oct 15 '12 at 15:17

I capture the alt and down or up arrow key to increment the value of a numericUpDown control. (I use the alt key + down/up key because this form also has a datagridview and I want down/up keys to act normally on that control.)

    private void frmAlzCalEdit_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.Alt && e.KeyCode == Keys.Down)
        {
            if (nudAlz.Value > nudAlz.Minimum) nudAlz.Value--;

        }
        if (e.Alt && e.KeyCode == Keys.Up)
        {
            if (nudAlz.Value < nudAlz.Maximum) nudAlz.Value++;
        }

    }

score 0 · Answer 6 · answered Jun 17 '16 at 23:36

Create a KeyUp event for your Form or use a library like I did to get a GlobalHook so you can press these keys outside the form.

Example:

 private void m_KeyboardHooks_KeyUp(object sender, KeyEventArgs e)
                {
                    if ( e.KeyCode == Keys.Alt || e.KeyCode == Keys.X)
                    {     


                    }
                }

Handle the KeyDown Event when ALT+KEY is Pressed

6 Answers6

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