Scroll Position - Win32 Programmer's Reference

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Scroll Position

Unless the LVS_NOSCROLL window style is specified, a list view control can be scrolled to show more items than can fit in the client area of the control. You can get a list view control's scroll position and related information, scroll a list view control by a specified amount, or scroll a list view control such that a specified list item is visible.

In icon view or small icon view, the current scroll position is defined by the view origin. The view origin is the set of coordinates, relative to the visible area of the list view control, that correspond to the view coordinates (0, 0). To get the current view origin, use the LVM_GETORIGIN message. This message should be used only in icon or small icon view; it returns an error in list or report view.

In list or report view, the current scroll position is defined by the top index. The top index is the index of the first visible item in the list view control. To get the current top index, use the LVM_GETTOPINDEX message. This message returns a valid result only in list or report view; it returns zero in icon or small icon view.

You can use the LVM_GETVIEWRECT message to get the bounding rectangle of all items in a list view control, relative to the visible area of the control.

The LVM_GETCOUNTPERPAGE message returns the number of items that fit in one page of the list view control. This message returns a valid result only in list and report views; in icon and small icon views, it returns the total number of items.

To scroll a list view control by a specific amount, use the LVM_SCROLL message. Using the LVM_ENSUREVISIBLE message, you can scroll the list view control, if necessary, to ensure that a specified item is visible.

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