[John]

Hi, I'm using v7.68. I have a Scrollbox component (doesn't matter if using TScrollBox or TsScrollBox) on a form that loads buttons inside at run time. The form is used modally (doesn't matter if modal or non-modal). The app freezes when a user attempts to scroll clicking in the vertical scroll bar area (not the thumb). This only seems to happen when “Smooth”=true. (not sure if this has any effect, but “tracking”=true)

John

[Hamilton]

Hi John,

Where is the smooth property you mention?

I just created a test app with a button and a scrollbox; the button creates another button on the scrollbox with a left and top position that places the button off the screen and makes the control scrollable – it works fine.

You say the problem exists when you use TScrollBox – surely that indicates the problem is in your code then not in the TsScrollBox? Apologies if I've misunderstood. If you can post any code I'll help you debug.

Regards,

Hamilton

[Support]

Hello John

What is your IDE? Can you make a demo, please?

[John]

Please see attached EXE demo…

[Support]

Thank you. Please describe your system where you have a problem.

You tried this Exe before uploading and had an error there?

[John]

Yes. I develop (D7) on Win7 64bit. Your response suggests you didn't experience the same issue when running the exe? I will test on some other boxes.

[John]

Just tested on an XP box and all was good. Tried running the app on my win7 with compatibility to XP3 earlier and it still froze. Weid, anyways I will turn smooth off just to be safe.

John

[CheshireCat]

Hello John,

take a look to this Site. Maybe there is your problem?

Best regards

[John]

Nice find. Seems like it's the problem, but I beleive I tested my app with the AC removed and it seemed to work ok. Anyways, smooth definitely seems to be the culprit.

Thanks for the help!

[Author]

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