I'm creating an interactive automation script to change a password and I'm trying to get the validation to work. When the ValidationState is set to Invalid, the text boxes do not appear invalid (I'd expect a red border, and perhaps a tooltip with the ValidationText). I am also wondering why the ValidationText property is never displayed.

Below is the core of my script code, am I implementing this correctly?

UI of my script:

         // Create the dialog box

        UIBuilder uib = new UIBuilder();
        // Configure the dialog box
        uib.RequireResponse = true;
        uib.RowDefs = "a;a;a;a;a;a";
        uib.ColumnDefs = "a;a";
        UIBlockDefinition pwdText = new UIBlockDefinition();
        pwdText.Type = UIBlockType.StaticText;
        pwdText.Text = "Enter the new Cassandra password:";
        pwdText.Height = 20;
        pwdText.Row = 0;
        pwdText.Column = 0;
        uib.AppendBlock(pwdText);
        UIBlockDefinition pwd = new UIBlockDefinition();
        pwd.Type = UIBlockType.PasswordBox;
        pwd.Height = 25;
        pwd.Width = 150;
        pwd.Row = 1;
        pwd.Column = 0;
        pwd.WantsOnChange = true;
        pwd.DestVar = nameof(pwd);
        pwd.IsRequired = true;
        pwd.ValidationState = UIValidationState.Invalid;
        pwd.ValidationText = "Passwords do not match 1";
        uib.AppendBlock(pwd);
        UIBlockDefinition repeatPwdText = new UIBlockDefinition();
        repeatPwdText.Type = UIBlockType.StaticText;
        repeatPwdText.Text = "Repeat the new Cassandra password:";
        repeatPwdText.Height = 20;
        repeatPwdText.Row = 2;
        repeatPwdText.Column = 0;
        uib.AppendBlock(repeatPwdText);
        UIBlockDefinition pwdRepeat = new UIBlockDefinition();
        pwdRepeat.Type = UIBlockType.PasswordBox;
        pwdRepeat.Height = 25;
        pwdRepeat.Width = 150;
        pwdRepeat.Row = 3;
        pwdRepeat.Column = 0;
        pwdRepeat.ValidationText = "Passwords do not match";
        pwdRepeat.ValidationState = UIValidationState.Invalid;
        pwdRepeat.WantsOnChange = true;
        pwdRepeat.DestVar = nameof(pwdRepeat);
        pwdRepeat.IsRequired = true;
        uib.AppendBlock(pwdRepeat);
        UIBlockDefinition changePwdButton = new UIBlockDefinition();
        changePwdButton.Type = UIBlockType.Button;
        changePwdButton.Text = "Change Password";
        changePwdButton.Height = 20;
        changePwdButton.Width = 150;
        changePwdButton.Row = 4;
        changePwdButton.Column = 0;
        uib.AppendBlock(changePwdButton);
        UIBlockDefinition validationState = new UIBlockDefinition();
        validationState.Type = UIBlockType.StaticText;
        validationState.Text = "Validation State is: ";
        validationState.Height = 20;
        validationState.Row = 5;
        validationState.Column = 0;
        uib.AppendBlock(validationState);

UIResults uir = null;
        bool isValid = false;
        do
        {
            // Display the dialog box
            uir = engine.ShowUI(uib);
            if (uir == null)
            {
                isValid = false;
                continue;
            }
            string pwdValue = uir.GetString(nameof(pwd));
            string pwdRepeatValue = uir.GetString(nameof(pwdRepeat));

            // Reset the values the user entered
            pwdRepeat.InitialValue = pwdRepeatValue;
            pwd.InitialValue = pwdValue;

// Actual validation code
            isValid = !string.IsNullOrWhiteSpace(pwdValue) && pwdValue.Length > 6 && pwdValue == pwdRepeatValue;
            pwd.ValidationState = isValid ? UIValidationState.Valid : UIValidationState.Invalid;
            pwdRepeat.ValidationState = isValid ? UIValidationState.Valid : UIValidationState.Invalid;
            validationState.Text = "Validation State is: " + pwdRepeat.ValidationState;
        } while (!isValid);