Labels & Text wont update accordingly - vb.net

Question

I developed an application which is like a digital comprehension sheet activity.
The order of which this works is:
A user double clicks an underscored text area on a text box
A form opens which asks them to place an answer
The answer is validated, if true it goes back to the original form
The issue here is that for some odd reason my labels don't update on step 3, as- well as the text. I have a label named lbAnswerStatus which notifies the user if they have a correct answer, the text does not update, and the 'SelectedText' on Form 1 should be replaced with the answer (if correct)
Here is my code:
Form 1 (when textbox is clicked):
Form2.Answer(answers(counter))
answers(counter) represents the correct answer being passed on, to compare with users answer in form 2
Form 2:
If tbAnswer.Text = theanswer Then
Form1.answerStatus(True, theanswer)
Form 1:
Public Sub answerStatus(status, answer)
If status = true Then
Form2.Close()
rtb.SelectedText = answer
lbAnswerStatus.ForeColor = Color.Green
End If
End Sub
My first assumption was that the Rich text box's SelectedText wasn't changing because it didn't have focus on it however, the lbAnswerStatus color didn't change either, so I figured that there was issues with making modifications to the form.
I used a message box to test whether lbAnswerStatus.Text would pop up and it did, so it can read but not write.
I also attempted to change the text of the label and selectedtext of the textbox in step 1 and it worked fine.
Any ideas what may be causing this issue?
Thanks.

Answer 1

I guess that you want your Form2 (AnswerForm) presented as a modal dialog. Doing that, you can return a result. You didn't say what you want to happen to the answer status label or the answer form if the supplied answer is incorrect.
Just as an example of how it can be done, create a new Windows Forms project. On Form1, place a button (Button1) and a label ("lblAnswerStatus"). Add a new form named "AnswerForm" to the project, and add a TextBox ("TextBox1") and a button ("bnDone").
As code for AnswerForm:
Public Class AnswerForm
Private statusLabel As Label
Private answerText As String
Private Sub bnDone_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bnDone.Click
If TextBox1.Text.Equals(answerText, StringComparison.CurrentCultureIgnoreCase) Then
' Alternative 1: set the color here if you want to
statusLabel.ForeColor = Color.Green
' return a value indicating success
Me.DialogResult = Windows.Forms.DialogResult.Yes
Me.Close()
Else
' indicate error
statusLabel.ForeColor = Color.Red
End If
End Sub
Public Sub New(ByVal statusLabel As Label, ByVal answerText As String)
InitializeComponent()
Me.statusLabel = statusLabel
Me.answerText = answerText
End Sub
End Class
and as code for Form1:
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
lblAnswerStatus.ForeColor = Color.Blue
Using answerFrm As New AnswerForm(lblAnswerStatus, "X")
Dim dlgResult = answerFrm.ShowDialog()
' Alternative 2: use this if you want to change the color in this handler
If dlgResult = DialogResult.Yes Then
lblAnswerStatus.ForeColor = Color.Purple
End If
End Using
End Sub
End Class
If you click Button1 on Form1, a dialog box appears. Type into its TextBox1 and click bnDone. Because the instance of AnswerForm has a reference to lblAnswerStatus (supplied in its constructor), it is easy to update the latter, e.g. it turns red if you enter the wrong answer.