title: How to capitalize letter only in beginning of sentences, and the next word is normal
body: <p>I use this:</p>
  
  <pre><code>Static PreviousLetter As Char
      If PreviousLetter = " "c Or TextBox1.Text.Length = 0 Then
          e.KeyChar = Char.ToUpper(e.KeyChar)
      End If
      PreviousLetter = e.KeyChar
  </code></pre>
  
  <p>But the result is always:</p>
  
  <pre><code>Good Night Every Body
  </code></pre>
  
  <p>How can I capitalize just the first letter in the sentence, leaving the other words normal? The result I want is:</p>
  
  <pre><code>Good night every body
  </code></pre>