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predictive RichTextBox vb.net 2010

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Last Modified: 2015-02-27
Hello Experts,

I'm trying to write a winform app - using a RichTextBox and when I type in a specific word and press ENTER, it will detect... for example. If I type in the word "Blue"- message = "Y" else "N"

The problem is: once "Blue" is detected, no matter what else I type, after pressing ENTER... Y always appears. How can resume back to normal typing. I use "N" to test it's working.

--code--------------------------------------------
 If e.KeyCode = Keys.Enter Then
            Dim net As Boolean = RichTextBox1.Text.Contains("Blue")
            If e.KeyCode = Keys.Enter Then
                If net Then
                    MsgBox("Y")
                Else
                    If Not net Then
                        MsgBox("N")
                    End If
            End If
            End If
        End If
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