Hello Martin.

Sorry, I do not understand the goal of clampinview.

Now about container.frame.sbhorz.pageup/pagedown.

With a simple demo-test it works.
This demo use the same waveform.pas than a other more complicated project. 

See attachment and video.

msescrolltest.zip
<http://mseide-msegui-talk.13964.n8.nabble.com/file/t2/msescrolltest.zip>  
msescrollpage_alone.mp4
<http://mseide-msegui-talk.13964.n8.nabble.com/file/t2/msescrollpage_alone.mp4> 
 

But inside a more complicated project, with same code, it does not work.

See video.
msescrollpage_strum.mp4
<http://mseide-msegui-talk.13964.n8.nabble.com/file/t2/msescrollpage_strum.mp4> 
 

The menu-items Up/Down to scroll use this:
(waveform.pas, line 239)

procedure twavefo.pageup(const sender: TObject);
begin
 container.frame.sbhorz.pageup ; 
end;

procedure twavefo.pagedown(const sender: TObject);
begin
container.frame.sbhorz.pagedown ;
end;

And there is no call to wavefo from outside, nor any timer working.
But you may see in video that scrolling by code works only once in
StrumPract.

https://github.com/fredvs/strumpract

;-(

Do you have a idea what is wrong ?

:-)

Fre;D



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