CODEWITHSUNDEEP
c#wpfpinvokeuser-inputuser32
Jamie Law
Jamie Law

Reputation: 11

How do i convert KeyPressevents keychar to virtual key code

I am writing a WPF app that allows a user to press a key on their keyboard and then store the virtual key code for later execution currently, my code only captures the KeyChar

private void Window_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
        {


            System.Windows.MessageBox.Show("Key char : " + e.Key);

        }

At a later stage, the code is executed, in something similar to this...

else if(e.Result.Text.Equals("windows"))
            {
                //windows key down
                keybd_event((byte)VK_LWIN, 0x5B, 0, 0);
                //windows key up
                keybd_event((byte)VK_LWIN, 0x5B, KEYEVENTF_KEYUP, 0);

            }

The keybd_event method uses virtual key codes to identify which key the program is required to execute on the system.

I can easily capture and execute these separate variables

but how do I convert the keyChar to Virtual key code for storing and then executing in the separate window?

User 32 DLL method.. https://www.pinvoke.net/default.aspx/user32.keybd_event

Upvotes: 0

Views: 2454

Answers (1)

Rhumborl
Rhumborl

Reputation: 16609

You can us the KeyInterop class. This contains static methods to convert between .Net Keys and VKeys:

int vkey;

private void Window_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
{
    vkey = System.Windows.Input.KeyInterop.VirtualKeyFromKey(e.Key);
    System.Windows.MessageBox.Show("Key char : " + e.Key);

}

{
    keybd_event((byte)vkey, 0x5B, 0, 0);
}

Upvotes: 1

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