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Burgs

Scrollbar code sharing...WM_HSCROLL explanation?

3 posts in this topic

Greetings,

The code below is the first number of lines contained in the "Func WM_HSCROLL" that is given numerous times in the AutoIT Help. I am posting it because I hoped somebody could explain what it is exactly these lines are doing, particularly the "$nScrollCode" and "$aSB_WindowInfo" variables...I am finding them to be rather enigmatic, I think they are possibly some sort of reserved commands...I can follow the rest of the function without too much difficulty.

I am trying to adapt the code to be able to handle/control the scrollbars in 2 different window GUI's at the same time. I have most of it completed except the "scrolling" is still unresponsive (only scrolling in 1 window instead of 2 concurrently)...I know these lines handle the scrolling process so I hope if I understand them better I can make the scrollbars in both windows share the same code successfully...

Func WM_HSCROLL($hwd, $Msg, $wParam, $lParam)
#forceref $Msg, $lParam
Local $nScrollCode = BitAND($wParam, 0x0000FFFF)
Local $index = -1, $xChar, $xPos
Local $Min, $Max, $Page, $Pos, $TrackPos
For $x = 0 To UBound($aSB_WindowInfo) - 1
     If $aSB_WindowInfo[$x][0] = $hwd Then
         $index = $x
         $xChar = $aSB_WindowInfo[$index][2]
         ExitLoop
     EndIf
Next
If $index = -1 Then Return 0

;...rest of function here...

EndFunc

Thanks in advance.

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I would personally look at Melba23's UDF for creating as they can be difficult for those who haven't used them before.


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Updated: 04/09/2015

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