RichTextBox Display the latest line

RichTextBox Display the latest line

Post by hirf-spam- » Fri, 16 Jul 2004 08:13:08


* XXXX@XXXXX.COM (dale zhang) scripsit:

My FAQ:

When using a RichTextBox control for displaying logging information, it is
useful to scroll the recently added line into view. There are two ways to
accomplish this:

\\\
Private Const WM_VSCROLL As Int32 = &H115
Private Const SB_BOTTOM As Int32 = 7

Private Declare Auto Function SendMessage Lib "user32.dll" ( _
ByVal hwnd As IntPtr, _
ByVal wMsg As Int32, _
ByVal wParam As Int32, _
ByVal lParam As Int32 _
) As Int32

Private Sub AddLine(ByVal Destination As RichTextBox, ByVal Text As String)
With Destination
.AppendText(Text & ControlChars.NewLine)
SendMessage(Destination.Handle, WM_VSCROLL, SB_BOTTOM, 0)
End With
End Sub
///

- or -

\\\
Dim ctr As Control = Me.ActiveControl
With Me.RichTextBox1
.Focus()
.AppendText("Hello World!")
.ScrollToCaret()
End With
ctr.Focus()
///

The 2nd solution has a side-effect: Setting the focus to the
RichTextBox control may raise validation events.

--
Herfried K. Wagner [MVP]
<URL: http://www.yqcomputer.com/ ;
 
 
 

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