Resize richtextbox when contents change. VBE 2010

Need a RTB to resize when contents change. Tried this code I found on the internet but it works oddly because it seems to change the height but not the width (even though a debug shows the value for rtbCurrent.Width = CInt(sf.Width) is calculated to 199 [from 40]).

Something simple like this would be really useful, though.

        Dim g As Graphics = rtbCurrent.CreateGraphics
        Dim f As Font = rtbCurrent.Font
        Dim sf As SizeF = g.MeasureString(rtbCurrent.Text, f, rtbCurrent.Width)
        rtbCurrent.Height = CInt(sf.Height)
        rtbCurrent.Width = CInt(sf.Width)
author3000Asked:
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Ess KayEntrapenuerCommented:
You can get if the control has scroll bars with this:

Public Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hwnd As IntPtr, ByVal nIndex As Integer) As Integer


And then call a function like this one after changing the text:

Private Sub ValidateTextBox(tb As RichTextBox)
    Dim Hdl As IntPtr = tb.Handle
    Dim Style, VBar As Integer

    tb.Width = iMinWidth
    Style = GetWindowLong(Hdl, GWL_STYLE)
    VBar = Style And WS_VSCROLL

    While VBar > 0 AndAlso tb.Width < iMaxWidth
        tb.Width += 24

        Style = GetWindowLong(Hdl, GWL_STYLE)
        VBar = Style And WS_VSCROLL
    End While
End Sub

Public Const WS_VSCROLL As Integer = &H200000
Public Const GWL_STYLE As Integer = (-16)







So essentiall, do the resizing in the validate method
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author3000Author Commented:
Oh, the old Validate trick. :)

Thanks for the code. I've got it implemented and it has SOLVED MY PROBLEM.
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