C# SendKeys.Send

Question

I am running on an issue using C# SendKeys.Send method. I am trying to replace keyboard keys with other keys, for example when I press \"a\" in keyboard I want that key to b

Answer 1

Have you tried switching .Send({BS}) with .Send("s")? Otherwise, can you clarify?

Answer 2

I solved this problem by registering global hot keys. Thank you. This was the resourse that I used to solve my problem.

Answer 3

I might be making a bad assumption, but if you are using this with a text box, you could:

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    if (e.KeyChar == 'a')
    {
        e.Handled = true;
    }
}

private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.A)
    {
        e.Handled = true;
        SendKeys.Send("s");
    }
}

Or even simpler:

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    if (e.KeyChar == 'a')
    {
        e.Handled = true;
        SendKeys.Send("s");
    }
}

Or if this isn't for use just with a text box, then can't you just revers your backspace and s key sends?

if ((Keys)keyCode== Keys.A)
{                    
    SendKeys.Send("{BS}"); // remove A
    SendKeys.Send("s");    // add S
}

Answer 4

I think that the SendKeys.Send("{BS}"); approach will never work (in either order). That's because the original key-pressed/key-released event gets processed after SendKeys.Send is posted. I think you should somehow cancel the key-down/key-up event for the character you want to remove before it is processed by the target window procedure (e.g. notepad's).

Answer 5

I would reverse my calls:

SendKeys.Send("{BS}");

SendKeys.Send("S");

EDIT (After Question Updated):

If you're working with the string (for your special characters), can you not just capture the string generated by the key press ("a") and modify it by setting the string to the unicode value of the character you're attempting to represent? If the other solutions people have been mentioning aren't working, that's where I'd try next...

Answer 6

I get "a" printed because backspace is sent immediately after "s" and it deletes the "s" character. How can I prevent this from happening?

uhm.....

don't send backspace immediately after sending s?

if ((Keys)keyCode== Keys.A)
            {
                Sendkeys.Send("{BS}"); // Deletes the "A" (already sent)
                SendKeys.Send("s"); // Sends the "S"
            }