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[CLOSED] Scrollbox detect vertical scroll
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Topic: [CLOSED] Scrollbox detect vertical scroll (Read 1582 times)
pcurtis
Hero Member
Posts: 951
[CLOSED] Scrollbox detect vertical scroll
«
on:
January 28, 2022, 11:18:48 pm »
How can I detect when a scrollbox is vertically scrolled and when it can't scroll anymore?
NOT NEEDED ANYMORE
«
Last Edit: January 29, 2022, 12:23:05 pm by pcurtis
»
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Windows 10 20H2
Laz 2.2.0
FPC 3.2.2
jamie
Hero Member
Posts: 6131
Re: Scrollbox detect vertical scroll
«
Reply #1 on:
January 29, 2022, 12:43:32 am »
https://docs.microsoft.com/en-us/windows/win32/controls/wm-vscroll
That may help you. With laz you use the LMessages and LM_VSCROLL I think..
otherwise you can use the windows unit and WM_VSCROLL to override the message
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The only true wisdom is knowing you know nothing
jamie
Hero Member
Posts: 6131
Re: Scrollbox detect vertical scroll
«
Reply #2 on:
January 29, 2022, 12:48:50 am »
Quote from: pcurtis on January 28, 2022, 11:18:48 pm
How can I detect when a scrollbox is vertically scrolled and when it can't scroll anymore?
Hmm, maybe you are talking about the Position of the scrollbar and size of the client height.?
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