Help on creating teleprompter in VB.NET

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When an RTB or Picturebox control .top reaches certain points (maybe it's the maximum .top of the form?). It is not moving anymore. I have a huge amount of text because of News scripts.

Another problem is, it is not that smooth when scrolling.

What I have tried:

This is my code using Timer (interval=1) control.

VB.NET

For i = 0 To 500 Step 50
     If trackBarSpeed.Value < 51 Then
        PictureBox1.Top = PictureBox1.Top + 1
     ElseIf trackBarSpeed.Value > 51 Then
        PictureBox1.Top = PictureBox1.Top - 1
     Else
        tmrScroll1.Stop()
     End If
Next

Do you have any better approach to this?

Thank you so much.

Posted 3-Sep-24 0:31am

Member 13049700

Updated 3-Sep-24 3:26am

Dave Kreskowiak

v4

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Pete O'Hanlon · Answer 1 · 2024-09-03T00:59:00

Solution 1

Looking at your code, all I can see is that you move 50 the top of the control 11 pixels. You have a for loop that is stepping up by 50, so you might as well just have written this as for count = 0 to 10. This will run so quickly that the top will appear to move almost instantly. I know that this project[^] is written in C# but you should be able to harvest knowledge from it for your implementation.

Posted 3-Sep-24 0:59am

Pete O'Hanlon

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Member 13049700 3-Sep-24 23:38pm

Thanks Pete,

It is now scrolling smoothly. I have another problem though.
When RichTextBox1.Top reaches the value of -62768 it stopped moving.

Can you give me also an idea about timer control. Do VS have timer faster than that?
Thanks in advance.