Spin Control Slider to move memo text

In order to move text up and down in a memo field I like to use a spin control or a slider. There are samles for images etc but not for a normal text field. How can I access the scroll bar of a memo field using a slider or a spin controll. Could any of you help me on this?
Thanks in advance

Hi Hans,

You could use:
ScrollDown: SendMessage(Handle(edt_Text),277,1,919272)
ScrollUpendMessage(Handle(Table),277,0,919272)

Regards,
Piet

Thank you Piet,
that worked! I checked the docs but so far could not figure out what the two parameters do ,277,1,919272
is that part of the Windows API (WIN32)?

Hans

Hi Hans,

I figured this out by trapping the scroll event for a control.
Then you can trace the parameters. I did this for a table control:

Event("HScroll","Table1",WM_HSCROLL)

PROCEDURE Hscroll(nMessage, WPARAM , LPARAM )
// Event trapping
Trace(nMessage,WPARAM,LPARAM)

Then use SendMessage with these parameters to call the Windows API.
I used this technique to make two tables horizontally scroll simultaneous. Instead of the trace the scrolling is redirected to the other table:

Sendmessage(Handle(Table2),WPARAM,LPARAM)

In your case I used WM_VSCROLL to trace the vertical scrolling.

Regards,
Piet

Thanks Piet,
I am a beginner and I will have a look in to this as soon as I have time. When you say "trapping the scroll event for a control." Then I assume I have to do that programatically or is that a feature under windev. Thanks for all the info anyway.

Hans

Hi Hans,

Yes, I mean by creating a test window with the necessary controls and use the code I posted to see what happens. You can use different WM_ constants fir different events.

Regards,
Piet