What do the symbols in the row header of DataGridView signify?
<p>The Windows Forms DataGridView automatically displays some symbols in the row header.</p>

<p>I cannot find any documentation of what symbols are displayed and exactly what they mean. Can somebody point me in the right direction?</p>

<p>(Sorry, this isn't really a programming question, and it's sounds like a shall-I-google-that-for-you type of question, but I have googled it and I can't find the answer.)</p>