title: Change mouse wheel scroll lines?
body: <p>I have a panel with autoscroll and I need to change the mouse scroll lines number</p>
  
  <p>I will mean this:</p>
  
  <p>(Mouse properties in spanish, sorry)</p>
  
  <p><img src="https://i.stack.imgur.com/vzsc6.jpg" alt="enter image description here"></p>
  
  <p>But I will change it in my program, for my panel, obvius, not in the SO!</p>
  
  <p>PS: for example the Winamp media player have an option for that.</p>
  
  <p>I can't find info anywhere, please help.</p>
  
  <blockquote>
    <p>UPDATE</p>
  </blockquote>
  
  <p>My scrollbar is a panel with "AutoScroll" property</p>
  
  <p>My event is this:</p>
  
  <pre><code>    Private Sub Panel1_MouseScroll(sender As Object, e As MouseEventArgs) Handles Panel1.MouseWheel
  
      Panel1.Invalidate()
  
      End Sub
  </code></pre>
  
  <p>This is the content of my panel:</p>
  
  <pre><code>  ' Checkbox drawing
  Public Sub updatecheckboxes()
      ' delete the old checkboxes
      Panel1.Controls.Clear()
      ' create the new checkboxes
      Dim filesystem = CreateObject("Scripting.FileSystemObject")
      Dim ThisDir = filesystem.GetFolder(My.Settings.folderpath)
      Dim i As Int32 = 0
      Dim pos As Int32 = 10
      For Each folder In ThisDir.Subfolders
          Array.Resize(mcheck, i + 1)
          mcheck(i) = New CheckBox
          With mcheck(i)
              .AutoSize = True
              .Location = New Point(10, pos)
              .Name = "CheckBox" &amp; i + 1
              .Text = folder.Name
          End With
          Me.Panel1.Controls.Add(mcheck(i))
          AddHandler mcheck(i).CheckedChanged, AddressOf LlamadaCheckBox
          i += 1
          pos += 20
      Next
  
  End Sub
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/Jt0v1.jpg" alt="enter image description here"></p>
  
  <p>I want to change the number of scrolled lines because of the distorted efefct inside the panel, If i use "one scoll-page" or "10 scrolls at time" like the imagen of Windows SO properties then I can fix it!</p>