• 0

[vb .net] Flicker in rich text box?


Question

19 answers to this question

Recommended Posts

  • 0

Hmmm try this, i can't see if it works because it doesn't flicker over here for me.

But make a new class file

paste this in it:

Public Class DoubleBufferRichTextBox

    Inherits System.Windows.Forms.RichTextBox

    Public Sub New()
        SetStyle(ControlStyles.DoubleBuffer, True)
        SetStyle(ControlStyles.AllPaintingInWmPaint, True)
    End Sub
    Public Event CustomPaint(ByVal e As PaintEventArgs)

    Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)

        RaiseEvent CustomPaint(e)

    End Sub

End Class

I'm not sure if it would work, because someone helped me out once with this, because my gradients inside a panel was flickering on resize, but Double Buffering had fixed this issue, not sure if it would work on Textboxes.

So once you've made that class above

go into the form where the actual RichTextBox control works

and where the Windows Form Generated Code is

look for where the RichTextBox is instantiated

i.e. should be something like

richTextBox = new System.Windows.Forms.RichTextBox

and just change it to

richTextBox = new DoubleBufferRichTextBox

  • 0
  bangbang023 said:
well I do but even when I disable it, still the same thing. I actually created a vanialla blank app with a rich text box and the same thing happens.

584840882[/snapback]

This may sound dumb but, are you using a custom visual style?

I don't know because it seems like it's only happening to you, you can't eliminate the possibilities which might be causing this issue, have u tried sending the exe to a friend to see if they experience the same problem?

  • 0

Hm I can also see the flicker.. probably because I have a crap video card :p (It's only noticable when theres a large amount of text though).. I'll have a look and see if I can find a solution :p

Dan

EDIT: I took a look and it doesnt seem as though you can do much about this as the framework isnt actually drawing the richtextbox. :(.. I guess if the flickering is that big a problem then you will have to go back to the TextBox. :) (Hopfully I'm wrong :p)

Edited by dannyres
  • 0

Sorry, but most versions of RichEdit simply flicker. It's a poorly written control and the MS coders were too lazy to properly use a back buffer. It has nothing to do with monitor, video card, or refresh rate.

The only thing I can suggest is messing with the window styles for the parent window and the rich edit window itself.

WS_CLIPCHILDREN for the parent and WS_CLIPSIBLINGS for the rich edit.

As well, CS_HREDRAW and CS_VREDRAW should not be classed as class styles for RegisterClassEx.

Edited by vcv
  • 0
  vcv said:
Sorry, but most versions of RichEdit simply flicker.  It's a poorly written control and the MS coders were too lazy to properly use a back buffer.  It has nothing to do with monitor, video card, or refresh rate.

The only thing I can suggest is messing with the window styles for the parent window and the rich edit window itself.

WS_CLIPCHILDREN for the parent and WS_CLIPSIBLINGS for the rich edit.

As well, CS_HREDRAW and CS_VREDRAW should not be classed as class styles for RegisterClassEx.

584844295[/snapback]

I figured it had to be the control after all. Thanks.

This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Posts

    • Cjam 2.0 by Razvan Serea Cjam is a lightweight and fast MP3 editor for Windows that lets you cut, join, and edit MP3 files without re-encoding. This means your audio quality remains untouched, and edits happen instantly. Cjam is ideal for quick, lossless edits—whether you're trimming music, combining tracks, or preparing audio for learning tools or podcasts. It features batch processing, scripting support, cue and playlist file handling, and a simple interface. Cjam is perfect for anyone who needs efficient MP3 editing without the complexity of full audio suites. Cjam requires a PC running Windows 10 or later and Microsoft .NET 6.0 or later. Key features for Cjam: No Re-encoding: Edit MP3 files without losing quality. Cut and Join MP3: Easily cut, trim, and combine MP3 tracks. Batch Processing: Edit multiple files at once for faster workflows. Scriptable Interface: Automate tasks with a custom command language. Cue and Playlist Support: Handle CUE and playlist files for seamless audio management. Fast and Lightweight: Quick processing with minimal system resources. Lossless Audio Editing: Ensure your edits don't affect audio quality. Simple User Interface: Clean, intuitive design for easy navigation. File Format Support: Works with MP3, Cjam-specific file formats (CJAMC, CJAMJ, CJAM). Cjam 2.0.0.0 fixes: Fixed a bug where the folder list was not updating on the vmp3 screen Download: Cjam 2.0 | 1.3 MB (Freeware) Links: Cjam Home Page | Cjam Manual | Screenshot Get alerted to all of our Software updates on Twitter at @NeowinSoftware
    • Honestly, i either don't care, mind, use, or had any problem with those. 11 is really good for me, has a lot of little refinements, looks great, if i wanted to tweak/fix it's behavior i would with a range of tools, and wouldn't come back to the 2010's looking Win 10 even at gunpoint.
    • You dont want a expensive hp laptop either managed to get 3 new zbooks and they all died on me.
    • Nothing inherently wrong, but why buy 2021 tech in 2025? Assuming you were aiming for 6-10 years of usage, better to buy something current.
    • I have begun using Windows 11 native passkey feature. i have four passkeys set up so far. Three work fine, One has never worked. I have removed it and recreated it several times, still no luck. Anyway, on the websites in which it works, it works geat. No more two 2FA.
  • Recent Achievements

    • Dedicated
      Cole Multipass earned a badge
      Dedicated
    • Week One Done
      Alexander 001 earned a badge
      Week One Done
    • Week One Done
      icecreamconesleeves earned a badge
      Week One Done
    • One Year In
      PAC0 earned a badge
      One Year In
    • One Month Later
      PAC0 earned a badge
      One Month Later
  • Popular Contributors

    1. 1
      +primortal
      567
    2. 2
      +FloatingFatMan
      187
    3. 3
      ATLien_0
      185
    4. 4
      Skyfrog
      113
    5. 5
      Som
      109
  • Tell a friend

    Love Neowin? Tell a friend!