问如何在Flowlayoutpanel中设置控件，调整大小并使用可用空间？

EN

'assuming you may have a variable number of richtextboxes you need to get a count of the ones that are visible
'also assuming the richtextboxes are already children of the flowlayoutpanel
'call this sub after you have put the unsized richtextboxes into the FlowlayoutPanel (assuming you are doing that dynamically)    
Private Sub SizeTextBoxes()
    Dim Items As Integer = 0
    'create an array for the richtextboxes you will be sizing
    Dim MyTextBoxes() As RichTextBox = Nothing
    For Each Control As Object In FlowLayoutPanel1.Controls
        If TryCast(Control, RichTextBox).Visible Then
            'create a reference to each visible textbox for sizing later
            ReDim Preserve MyTextBoxes(Items)
            MyTextBoxes(Items) = DirectCast(Control, RichTextBox)
            Items += 1
        End If
    Next

    'if the flowlayoutpanel doesn't have any richtextboxes in it then MyTextBoxes will be nothing
    If Not IsNothing(MyTextBoxes) Then
        'get the height for the text boxes based on how many there are and the height of the flowlayoutpanel
        Dim BoxHeight As Integer = FlowLayoutPanel1.Height \ Items
        For Each TextBox As RichTextBox In MyTextBoxes
            TextBox.Height = BoxHeight
        Next
    End If
End Sub

Private WithEvents tlp As New TableLayoutPanel

Public Sub New()
  InitializeComponent()

  tlp.Location = New Point(150, 16)
  tlp.Size = New Size(Me.ClientSize.Width - 166, Me.ClientSize.Height - 32)
  tlp.Anchor = AnchorStyles.Left Or AnchorStyles.Top Or 
               AnchorStyles.Right Or AnchorStyles.Bottom
  tlp.ColumnCount = 1
  tlp.RowCount = 3
  tlp.ColumnStyles.Add(New ColumnStyle(SizeType.Percent, 100))
  tlp.RowStyles.Add(New RowStyle(SizeType.Percent, 50))
  tlp.RowStyles.Add(New RowStyle(SizeType.Absolute, 32))
  tlp.RowStyles.Add(New RowStyle(SizeType.Percent, 50))

  tlp.Controls.Add(New RichTextBox With {.Dock = DockStyle.Fill}, 0, 0)
  tlp.Controls.Add(New RichTextBox With {.Dock = DockStyle.Fill}, 0, 1)
  tlp.Controls.Add(New RichTextBox With {.Dock = DockStyle.Fill}, 0, 2)

  Me.Controls.Add(tlp)
End Sub

If tlp.RowStyles(1).Height = 0 Then
  tlp.GetControlFromPosition(0, 1).Enabled = True
  tlp.RowStyles(1).Height = 32
Else
  tlp.GetControlFromPosition(0, 1).Enabled = False
  tlp.RowStyles(1).Height = 0
End If