ASP Button (Command vs Submit)

I want this to be a command button not a submit button, so that when the user presses the "Submit" button is "clicked".

ASP Code:
<asp:Button CommandName="StartButtonName" CommandArgument="soo"
     CausesValidation="false" ID="StartButton" Text="..."
     Visible="false" runat="s开发者_运维百科erver" OnClick="StartButton_Click" />

Generated HTML code
<input type="submit" name="ctl00$ContentPlaceHolder1$StartButton"
       value="..." id="ctl00_ContentPlaceHolder1_StartButton" />

Why does my ASP Code not generate a command button?

Set UseSubmitBehavior to false. See the MSDN page for more info.