Add a checkbox to allow the labels to be updated whenever the input text changes [closed] - vb.net

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I am very new to programming language and am in my first Programming class at my university. For a project we are creating a VERY simple project where the user enters words and the program puts them together. It's day one stuff I know but I'm trying to go for the extra credit and "Add a check box to allow the labels to be updated whenever the input text changes".
I have a program that when you type in two separate words in separate text boxes it displays each word individually and then also the two words combined at the bottom. Our professor wants my to add an check box option at the bottom that when clicked with make it so when the users types the two words they display automatically without clicking the display button.
I know this is easy stuff, but any help would be much appreciated.
Thank you for your help.
Public Class form1
Private Sub Label1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lblLeft.Click
End Sub
Private Sub lbl2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lblRight.Click
End Sub
Private Sub txtBoxLeft_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtBoxLeft.TextChanged
End Sub
Private Sub btnUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
Dim strTxtBoxLeft As String
strTxtBoxLeft = txtBoxLeft.Text
Dim strTxtBoxRight As String
strTxtBoxRight = txtBoxRight.Text
lblLeft.Text = strTxtBoxLeft
lblRight.Text = strTxtBoxRight
lblCombo.Text = strTxtBoxLeft & " " & strTxtBoxRight
End Sub
Private Sub chkbox_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chkbox.CheckedChanged
If chkbox.CheckState = False Then
End If
End Sub
Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
Me.Close()
End Sub
End Class

Answer 1

Try this:
Public Class Form1
Private Sub btnUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
combineText()
End Sub
Private Sub chkbox_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chkbox.CheckedChanged
If chkbox.CheckState = False Then
lblCombo.Text = ""
End If
End Sub
Private Sub txtBox_TextChanged(sender As Object, e As EventArgs) Handles txtBoxRight.TextChanged, txtBoxLeft.TextChanged
If chkbox.CheckState Then
combineText()
End If
End Sub
Private Sub combineText()
lblCombo.Text = txtBoxLeft.Text & " " & txtBoxRight.Text
End Sub
End Class
Note: I have consolidated your logic down to just grab the text from the text boxes themselves. There is also one handler that handles text changing in either of the text boxes. Finally, there is a single method that handles combining the values of the two text boxes together, either via the text changed event if the check box is checked or if the user clicks the update button. Also, if the user unchecks the check box, then it will clear the results. Then when the user clicks update it will display the combined text again.