how to detect two hot key in win form app like CTRL +C , CTRL+ W

Question

my question is how to detect two hot keys in win form application CTRL +C,CTRL,K like visual studio commenting command

I need to simulate VS hot key For commenting a line of code

He's asking how to detect the sequence - Ctrl+C, followed by Ctrl+K - not one independent from the other. — Matt Davis, Dec 25 '13 at 16:40
@mohammedsameeh: if you want to handle two hot keys sequentially you need to check for `sequence` , check my answer. — Sudhakar Tillapudi, Dec 25 '13 at 16:58

score 1 · Answer 1 · answered Dec 25 '13 at 16:33

1

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
   if (e.Modifiers == Keys.Control && e.KeyCode == Keys.C)
   {

   }
}

answered Dec 25 '13 at 16:33

Kurubaran

8,696
5
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score 1 · Answer 2 · edited May 23 '17 at 12:14

1

Simple way is... There is a Windows API Function called ProcessCmdKey, by overriding this function we can achieve what we want

protected override bool ProcessCmdKey(ref Message msg, Keys keyData) {
   if (keyData == (Keys.Control | Keys.C)) {
      MessageBox.Show("You have pressed the shortcut Ctrl+C");
      return true;
   }
   return base.ProcessCmdKey(ref msg, keyData);
}

Microsoft Documentation can be found here

source

edited May 23 '17 at 12:14

Community

1
1

answered Dec 25 '13 at 16:37

Kirk

4,957
2
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59

Please give attribution when you pull an answer from another [question](http://stackoverflow.com/questions/4596600/cant-detect-a-ctrl-key-shortcut-on-keydown-events-whenever-theres-a-readonly/4596641#4596641). – Matt Davis Dec 25 '13 at 16:39
1

Actually i gave the link to the original post. your like is a 2nd dupe – Kirk Dec 25 '13 at 16:42

score 1 · Accepted Answer · edited Jun 02 '15 at 11:53

private bool _isFirstKeyPressedW = false;

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.Control & e.KeyCode == Keys.W) 
    {
        _isFirstKeyPressedW = true;
    }
    if (_isFirstKeyPressedW) 
    {
        if (e.Control & e.KeyCode == Keys.S) 
        {
            //write your code 
        } 
        else 
        {
            _isFirstKeyPressedW = e.KeyCode == Keys.W;
        }
    }
}

Sudhakar Tillapudi · Answer 4 · 2013-12-25T17:06:56.037

0

if you want to handle Ctrl + C followed by Ctrl+ K you need to maintain a state variable.

Set the Form KeyPreview property to true and handle the Form KeyDown event.

Try This:

   this.KeyPreview=true;
   private bool isFirstKeyPressed= false;
    private void Form1_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.Control && e.KeyCode == Keys.C)
        {               
            isFirstKeyPressed = true;                
        }


        if (isFirstKeyPressed)
        {
            if (e.Control && e.KeyCode == Keys.K)
            {
                MessageBox.Show("Ctrl+C and Ctrl+K pressed Sequentially");
                /*write your code here*/
                isFirstKeyPressed= false;
            }
        }
    }

edited Dec 25 '13 at 17:06

answered Dec 25 '13 at 16:33

Sudhakar Tillapudi

25,935
5
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67

`isFirstKeyPressed` ought to be reset to false in *every* case after it is set to true, right? – Matt Davis Dec 25 '13 at 17:04
yes it has to be but if user press `Ctrl+C` , `Ctrl` and before pressing the `K` itself `isFirstKeyPressed` becomes false. – Sudhakar Tillapudi Dec 25 '13 at 17:11
@SudhakarTillapudi your code is right but it miss an important thing if you press (CTRL+C) then followed by any random character and then (CTRL+W) will be executed i will post the code , thanks – mohammed sameeh Dec 30 '13 at 17:17

how to detect two hot key in win form app like CTRL +C , CTRL+ W

4 Answers4