Nice article.
Can you please post tutorial to show "How to Cancel Key Stroke"
For instance, If I want to cancel non Numeric characters being entered in textBox.

Hello,

That's a good addition for this tutorial.
You can cancel they key stroke from the KeyDown event or from the TextChanged event of the TextBox, as in the following example:

Match StrC = Regex.Match(txtC.Text, ("^-+$|^[0-9]+$"));
bool ParseRes = Double.TryParse(txtC.Text, System.Globalization.NumberStyles.Number, System.Globalization.NumberFormatInfo.CurrentInfo, out DblNum);
if (ParseRes == false & txtC.Text != "" & StrC.Success == false)
{
txtC.Text = "";
txtC.Focus();
txtC.BackColor = Color.FromArgb(255, 237, 237);
}

Here I'm using both RegEx and the TryParse() method to check if there is a valid number entered in the TextBox named txtC.

hi, How do i override the keyUp event for my Rich text box, so that it only prints my specified characters and does not print the actual character pressed on the keyboard.

To replace character 'a'



private void textBox1_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
{


//Check if
if (e.KeyChar =='a')
{
e.Handled =true; // This will cancel the keystorke as asked before
textBox1.Text +='\u0634'; //Print unicode char instead of 'a'
}
}

What includes do you have w/ the file

HI ,
My application requies to generate a log file that contains the logs of the keys pressed ,while my application is running .This is irrespective of the active window .For instance if Word is open and keys are pressed i should be able to get the sequence of keys pressed .
Since the events of keys pressed is handle by the acive window I am not able to get the key strokes pressed.

I believe I shall have to capture the key events at the system level.
How do i do this using eVC .

hi,

for VB:

if you dont want the key Up to be processed in your control use the following code

Private Sub textbox1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles textbox1.KeyDown
If e.KeyCode = Keys.Up Then
e.SuppressKeyPress = True
End If
end sub

hi if i want to find that which key are pressed in other windows instead of my application form means spying of my computer or any other computer on network than how can i do this
or simply how can i record keyboard inputs and record them in a file all keys for using any application active window and also my program is hiddden so what is the procedure for this.

what if i want to generate and capture the flying window keys' events,thx

hi,
Can i take inputs by pressing two keys at same time, like A+J pressing it simultaneously how do i input to the code.

How about receiving key input into two controls simultaneously? is it possible..? how?

Nice tutorial. But how about getting input from keyboard without the form being active? like a keylogger

nice tutorial.but how about Getting Input From Keyboard when computing a grade in a form of bufferedReader and JOption?

I want to know how to use keypad ... thanks

Hi I want to make a type programma for people who want to learn how to type how kan I make a visual element dat randomly changes a Letter on the keyboard

I want to know how to use Arrow keys Or direction Keys... thanks

Like the tutorial above says :

if (keyEvent.KeyData == Keys.A)<-- (the " A" can be replace by another character when you type Keys. you will get a list from visual studio there you can select all the possibilities)
-->
<-- what to do if condition is true -->
{
MessageBox.Show("'A', and only A, was pressed.");
}