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Old May 9th, 2004, 08:53 PM
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Default How to put Desc/Asc triangle symbol on List View?

Does anyone know how to put Desc Triangle symbol on List View Column Heading when it is set to have Descending sorting and change to Asc triangle symbol on the list view column heading when it is set to have Ascending sorting?

Thanks a lot in advanced!!!

Old May 10th, 2004, 12:17 PM
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This is a snipped of the code I use. My icons are in a ImageList (imgList) control.
You can find all the API definitions in the APIViewer. Sorry if did not post the whole thing, it is just a big UserControl that I designed. Call this code anytime the sorting mode changes.


    Dim hColHeader As Long
    Dim hItem As HDITEM
    Dim k As Long
    Dim bAlignRight As Boolean

    hColHeader = SendMessage(lstData.hwnd, LVM_GETHEADER, 0, 0)
    SendMessage hColHeader, HDM_SETIMAGELIST, 0, ByVal imgList.hImageList

    For k = 0 To lstData.ColumnHeaders.Count - 1
        bAlignRight = (lstData.ColumnHeaders.Item(k + 1).Alignment = lvwColumnRight)
        hItem.mask = HDI_FORMAT Or HDI_IMAGE
        If bAlignRight Then
            hItem.fmt = HDF_STRING Or HDF_RIGHT
            hItem.fmt = HDF_STRING
        End If
        If k = lstData.SortKey Then
            hItem.fmt = hItem.fmt Or HDF_IMAGE
            If bAlignRight Then hItem.fmt = hItem.fmt Or HDF_BITMAP_ON_RIGHT
        End If
        hItem.iImage = _
            imgList.ListImages(IIf(lstData.SortOrder, cAscending, cDescending)).index - 1
        SendMessage hColHeader, HDM_SETITEM, k, hItem

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