WM_MEASUREITEM (in List Boxes) - Parameters

sListBox (SHORT)

List-box identifier.

sItemIndex (SHORT)

Item index.

The zero-based index of the item which has changed.

sHeight (SHORT)

Height of item.

sWidth (SHORT)

Width of item.

This value is required only if the list box control is scrollable horizontally, that is, it has a style of LS_HORZSCROLL.

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