I have a program that I need help with.

Write a program that allows the user to use a button to toggle the color of
the text in a text box between black and red.

Can anyone help?

You could declare a boolean and set its initial value to true or false. under the button's onclick event, check the boolean with an if/else; for example, if it's true, set the color to black or if it's false, set the color to red. before the exiting the sub, negate the boolean.

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e _
As System.EventArgs) Handles Button2.Click
If TextBox1.ForeColor = Color.Red Then
TextBox1.ForeColor = Color.Black
Else
TextBox1.ForeColor = Color.Red
End If
End Sub

It will work without "Else
TextBox1.ForeColor = Color.Red"


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