[CLOSED] Scrollbox detect vertical scroll
lazarus / 31-LCL

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pcurtis · 2022-01-28 22:18

How can I detect when a scrollbox is vertically scrolled and when it
can't scroll anymore?

NOT NEEDED ANYMORE

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jamie · 2022-01-28 23:43

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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jamie · 2022-01-28 23:48

Quote from: pcurtis on January 28, 2022, 11:18:48 pmHow 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.?