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Programatically getting a RichTextBox to scroll - What Am I doing Wrong

Ive been working on this since yesterday and its bugging me. Although the
event is firing, The box does not scroll. Can anyone see what Im doing
wrong. I suspect it is stupidly simple.

TIA

SubClass RichtextBox in order to fire the OnVScroll Event

Public Class MyRichTextBox

Inherits RichTextBox

Public Sub PerformVScroll( )

MyBase.OnVScrol l(EventArgs.Emp ty)

End Sub

End Class

- This button invokes the PerformVScroll -

Private Sub Button2_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles PerformVscroll. Click

RTB.PerformVScr oll()

End Sub

- THis confirms that the event has been raised -

Private Sub handleScroll(By Val sender As System.Object, ByVal e As
System.EventArg s) Handles RTB.VScroll

Console.WriteLi ne("Handling scroll")

End Sub


--
Regards - One Handed Man

Author : Fish .NET & Keep .NET
=============== =============== ===========
This posting is provided "AS IS" with no warranties,
and confers no rights.

Nov 20 '05 #1
4 4407
In article <uP************ **@TK2MSFTNGP12 .phx.gbl>, terry_burnsREMO VE%
FO*********@BTO penworld.com says...
Ive been working on this since yesterday and its bugging me. Although the
event is firing, The box does not scroll. Can anyone see what Im doing
wrong. I suspect it is stupidly simple.

TIA

SubClass RichtextBox in order to fire the OnVScroll Event

Public Class MyRichTextBox

Inherits RichTextBox

Public Sub PerformVScroll( )

MyBase.OnVScrol l(EventArgs.Emp ty)

End Sub

End Class

- This button invokes the PerformVScroll -

Private Sub Button2_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles PerformVscroll. Click

RTB.PerformVScr oll()

End Sub

- THis confirms that the event has been raised -

Private Sub handleScroll(By Val sender As System.Object, ByVal e As
System.EventArg s) Handles RTB.VScroll

Console.WriteLi ne("Handling scroll")

End Sub


You're simply causing all event subscribers to be notified that a scroll
has happened. It's not actually performing the scroll. For that, you
would probably either need to:

1) Send the WM_VSCROLL message to your control.
2) or try the ScrollToCaret() function.

--
Patrick Steele
Microsoft .NET MVP
http://weblogs.asp.net/psteele
Nov 20 '05 #2
The carret worked ok so thanks for that. I looked for examples on how to
send messages to the control but of yet have not found any. Do you have a
good reference I can look at ?

Many Thanks

--
Regards - One Handed Man

Author : Fish .NET & Keep .NET
=============== =============== ===========
This posting is provided "AS IS" with no warranties,
and confers no rights.
"Patrick Steele [MVP]" <pa*****@mvps.o rg> wrote in message
news:MP******** *************** *@msnews.micros oft.com...
In article <uP************ **@TK2MSFTNGP12 .phx.gbl>, terry_burnsREMO VE%
FO*********@BTO penworld.com says...
Ive been working on this since yesterday and its bugging me. Although the event is firing, The box does not scroll. Can anyone see what Im doing
wrong. I suspect it is stupidly simple.

TIA

SubClass RichtextBox in order to fire the OnVScroll Event

Public Class MyRichTextBox

Inherits RichTextBox

Public Sub PerformVScroll( )

MyBase.OnVScrol l(EventArgs.Emp ty)

End Sub

End Class

- This button invokes the PerformVScroll -

Private Sub Button2_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles PerformVscroll. Click

RTB.PerformVScr oll()

End Sub

- THis confirms that the event has been raised -

Private Sub handleScroll(By Val sender As System.Object, ByVal e As
System.EventArg s) Handles RTB.VScroll

Console.WriteLi ne("Handling scroll")

End Sub


You're simply causing all event subscribers to be notified that a scroll
has happened. It's not actually performing the scroll. For that, you
would probably either need to:

1) Send the WM_VSCROLL message to your control.
2) or try the ScrollToCaret() function.

--
Patrick Steele
Microsoft .NET MVP
http://weblogs.asp.net/psteele

Nov 20 '05 #3
In article <Ot************ **@TK2MSFTNGP11 .phx.gbl>, terry_burnsREMO VE%
FO*********@BTO penworld.com says...
The carret worked ok so thanks for that. I looked for examples on how to
send messages to the control but of yet have not found any. Do you have a
good reference I can look at ?


See this google post:

http://tinyurl.com/m4in

--
Patrick Steele
Microsoft .NET MVP
http://weblogs.asp.net/psteele
Nov 20 '05 #4
Excellent Patrick, You have been most helpful this did the trick

;-D

--
Regards - One Handed Man

Author : Fish .NET & Keep .NET
=============== =============== ===========
This posting is provided "AS IS" with no warranties,
and confers no rights.
"Patrick Steele [MVP]" <pa*****@mvps.o rg> wrote in message
news:MP******** *************** *@msnews.micros oft.com...
In article <Ot************ **@TK2MSFTNGP11 .phx.gbl>, terry_burnsREMO VE%
FO*********@BTO penworld.com says...
The carret worked ok so thanks for that. I looked for examples on how to
send messages to the control but of yet have not found any. Do you have a good reference I can look at ?


See this google post:

http://tinyurl.com/m4in

--
Patrick Steele
Microsoft .NET MVP
http://weblogs.asp.net/psteele

Nov 20 '05 #5

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