How to hide multiple buttons

[dandalero]

if i place 20 different buttons on my form, how can i hide them using the for each function or any other function instead of writing the following for each button:
"button1.visible=true"
.
.
.
.
"button20.visible=true"?

[Frinavale]

Add the buttons to a List(Of Button) when you add the buttons to the form. Then you can loop through them.

For example,
Declare a private List(Of Button) member called _buttons. Then, in the code where you're adding the buttons to the form also add them to this list.

Public Class Form1
 
  Private _buttons As List(Of Button)
 
  Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    _buttons = New List(Of Button)
    For i As Integer = 0 To 19
      Dim btn As New Button
      btn.Height = 20
      btn.Width = 50
      btn.Text = String.Format("{0}", i + 1)
      btn.Name = String.Format("{0}{1}", "btn_", i + 1)
      btn.Location = New Point(0, i * 20 + 5)
      AddHandler btn.Click, AddressOf Button_Click
      _buttons.Add(btn)
      Me.Controls.Add(btn)
    Next
    Me.Height = 25 * 20
  End Sub
 
  Private Sub Button_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
    MessageBox.Show(String.Format("{0} {1}", CType(sender, Button).Name, "was clicked"))
  End Sub
End Class

-Frinny