C# Definition:

        public enum ListViewMessages : int  
        {  
            LVM_FIRST = 0x1000,  
            LVM_SCROLL = (LVM_FIRST + 20)  
        }

C# Definition (almost complete?):

        // Enumeration is set to unicode, ANSI counterparts are commented out.
        // Contains a few undocumented messages of which the name was invented.
        public enum LVM
        {
            FIRST                    = 0x1000,
            SETUNICODEFORMAT         = 0x2005,        // CCM_SETUNICODEFORMAT,
            GETUNICODEFORMAT         = 0x2006,        // CCM_GETUNICODEFORMAT,
            GETBKCOLOR               = (FIRST + 0),
            SETBKCOLOR               = (FIRST + 1),
            GETIMAGELIST             = (FIRST + 2),
            SETIMAGELIST             = (FIRST + 3),
            GETITEMCOUNT             = (FIRST + 4),
            GETITEMA                 = (FIRST + 5),
            GETITEMW                 = (FIRST + 75),
            GETITEM                  = GETITEMW,
            //GETITEM                = GETITEMA,
            SETITEMA                 = (FIRST + 6),
            SETITEMW                 = (FIRST + 76),
            SETITEM                  = SETITEMW,
            //SETITEM                = SETITEMA,
            INSERTITEMA              = (FIRST + 7),
            INSERTITEMW              = (FIRST + 77),
            INSERTITEM               = INSERTITEMW,
            //INSERTITEM             = INSERTITEMA,
            DELETEITEM               = (FIRST + 8),
            DELETEALLITEMS           = (FIRST + 9),
            GETCALLBACKMASK          = (FIRST + 10),
            SETCALLBACKMASK          = (FIRST + 11),
            GETNEXTITEM              = (FIRST + 12),
            FINDITEMA                = (FIRST + 13),
            FINDITEMW                = (FIRST + 83),
            GETITEMRECT              = (FIRST + 14),
            SETITEMPOSITION          = (FIRST + 15),
            GETITEMPOSITION          = (FIRST + 16),
            GETSTRINGWIDTHA          = (FIRST + 17),
            GETSTRINGWIDTHW          = (FIRST + 87),
            HITTEST                  = (FIRST + 18),
            ENSUREVISIBLE            = (FIRST + 19),
            SCROLL                   = (FIRST + 20),
            REDRAWITEMS              = (FIRST + 21),
            ARRANGE                  = (FIRST + 22),
            EDITLABELA               = (FIRST + 23),
            EDITLABELW               = (FIRST + 118),
            EDITLABEL                = EDITLABELW,
            //EDITLABEL              = EDITLABELA,
            GETEDITCONTROL           = (FIRST + 24),
            GETCOLUMNA               = (FIRST + 25),
            GETCOLUMNW               = (FIRST + 95),
            SETCOLUMNA               = (FIRST + 26),
            SETCOLUMNW               = (FIRST + 96),
            INSERTCOLUMNA            = (FIRST + 27),
            INSERTCOLUMNW            = (FIRST + 97),
            DELETECOLUMN             = (FIRST + 28),
            GETCOLUMNWIDTH           = (FIRST + 29),
            SETCOLUMNWIDTH           = (FIRST + 30),
            GETHEADER                = (FIRST + 31),
            CREATEDRAGIMAGE          = (FIRST + 33),
            GETVIEWRECT              = (FIRST + 34),
            GETTEXTCOLOR             = (FIRST + 35),
            SETTEXTCOLOR             = (FIRST + 36),
            GETTEXTBKCOLOR           = (FIRST + 37),
            SETTEXTBKCOLOR           = (FIRST + 38),
            GETTOPINDEX              = (FIRST + 39),
            GETCOUNTPERPAGE          = (FIRST + 40),
            GETORIGIN                = (FIRST + 41),
            UPDATE                   = (FIRST + 42),
            SETITEMSTATE             = (FIRST + 43),
            GETITEMSTATE             = (FIRST + 44),
            GETITEMTEXTA             = (FIRST + 45),
            GETITEMTEXTW             = (FIRST + 115),
            SETITEMTEXTA             = (FIRST + 46),
            SETITEMTEXTW             = (FIRST + 116),
            SETITEMCOUNT             = (FIRST + 47),
            SORTITEMS                = (FIRST + 48),
            SETITEMPOSITION32        = (FIRST + 49),
            GETSELECTEDCOUNT         = (FIRST + 50),
            GETITEMSPACING           = (FIRST + 51),
            GETISEARCHSTRINGA        = (FIRST + 52),
            GETISEARCHSTRINGW        = (FIRST + 117),
            GETISEARCHSTRING         = GETISEARCHSTRINGW,
            //GETISEARCHSTRING       = GETISEARCHSTRINGA,
            SETICONSPACING           = (FIRST + 53),
            SETEXTENDEDLISTVIEWSTYLE = (FIRST + 54),            // optional wParam == mask
            GETEXTENDEDLISTVIEWSTYLE = (FIRST + 55),
            GETSUBITEMRECT           = (FIRST + 56),
            SUBITEMHITTEST           = (FIRST + 57),
            SETCOLUMNORDERARRAY      = (FIRST + 58),
            GETCOLUMNORDERARRAY      = (FIRST + 59),
            SETHOTITEM               = (FIRST + 60),
            GETHOTITEM               = (FIRST + 61),
            SETHOTCURSOR             = (FIRST + 62),
            GETHOTCURSOR             = (FIRST + 63),
            APPROXIMATEVIEWRECT      = (FIRST + 64),
            SETWORKAREAS             = (FIRST + 65),
            GETWORKAREAS             = (FIRST + 70),
            GETNUMBEROFWORKAREAS     = (FIRST + 73),
            GETSELECTIONMARK         = (FIRST + 66),
            SETSELECTIONMARK         = (FIRST + 67),
            SETHOVERTIME             = (FIRST + 71),
            GETHOVERTIME             = (FIRST + 72),
            SETTOOLTIPS              = (FIRST + 74),
            GETTOOLTIPS              = (FIRST + 78),
            SORTITEMSEX              = (FIRST + 81),
            SETBKIMAGEA              = (FIRST + 68),
            SETBKIMAGEW              = (FIRST + 138),
            GETBKIMAGEA              = (FIRST + 69),
            GETBKIMAGEW              = (FIRST + 139),
            SETSELECTEDCOLUMN        = (FIRST + 140),
            SETVIEW                  = (FIRST + 142),
            GETVIEW                  = (FIRST + 143),
            INSERTGROUP              = (FIRST + 145),
            SETGROUPINFO             = (FIRST + 147),
            GETGROUPINFO             = (FIRST + 149),
            REMOVEGROUP              = (FIRST + 150),
            MOVEGROUP                = (FIRST + 151),
            GETGROUPCOUNT            = (FIRST + 152),
            GETGROUPINFOBYINDEX      = (FIRST + 153),
            MOVEITEMTOGROUP          = (FIRST + 154),
            GETGROUPRECT             = (FIRST + 98),
            SETGROUPMETRICS          = (FIRST + 155),
            GETGROUPMETRICS          = (FIRST + 156),
            ENABLEGROUPVIEW          = (FIRST + 157),
            SORTGROUPS               = (FIRST + 158),
            INSERTGROUPSORTED        = (FIRST + 159),
            REMOVEALLGROUPS          = (FIRST + 160),
            HASGROUP                 = (FIRST + 161),
            GETGROUPSTATE            = (FIRST + 92),
            GETFOCUSEDGROUP          = (FIRST + 93),
            SETTILEVIEWINFO          = (FIRST + 162),
            GETTILEVIEWINFO          = (FIRST + 163),
            SETTILEINFO              = (FIRST + 164),
            GETTILEINFO              = (FIRST + 165),
            SETINSERTMARK            = (FIRST + 166),
            GETINSERTMARK            = (FIRST + 167),
            INSERTMARKHITTEST        = (FIRST + 168),
            GETINSERTMARKRECT        = (FIRST + 169),
            SETINSERTMARKCOLOR       = (FIRST + 170),
            GETINSERTMARKCOLOR       = (FIRST + 171),
            GETSELECTEDCOLUMN        = (FIRST + 174),
            ISGROUPVIEWENABLED       = (FIRST + 175),
            GETOUTLINECOLOR          = (FIRST + 176),
            SETOUTLINECOLOR          = (FIRST + 177),
            CANCELEDITLABEL          = (FIRST + 179),
            MAPINDEXTOID             = (FIRST + 180),
            MAPIDTOINDEX             = (FIRST + 181),
            ISITEMVISIBLE            = (FIRST + 182),
            GETACCVERSION            = (FIRST + 193),
            GETEMPTYTEXT             = (FIRST + 204),
            GETFOOTERRECT            = (FIRST + 205),
            GETFOOTERINFO            = (FIRST + 206),
            GETFOOTERITEMRECT        = (FIRST + 207),
            GETFOOTERITEM            = (FIRST + 208),
            GETITEMINDEXRECT         = (FIRST + 209),
            SETITEMINDEXSTATE        = (FIRST + 210),
            GETNEXTITEMINDEX         = (FIRST + 211),
            SETPRESERVEALPHA         = (FIRST + 212),
            SETBKIMAGE               = SETBKIMAGEW,
            GETBKIMAGE               = GETBKIMAGEW,
            //SETBKIMAGE             = SETBKIMAGEA,
            //GETBKIMAGE             = GETBKIMAGEA,
        }

VB Definition:

Enum ListViewMessages
   TODO
End Enum

Notes:

For more information on the 'invented' names for the undocumented ListView Messages see:

http://www.geoffchappell.com/viewer.htm?doc=studies/windows/shell/comctl32/controls/listview/messages/index.htm&tx=25

Example:

You can scroll a ListView using LVM_SCROLL with SendMessage. Example:

SendMessage(listView.Handle, (uint)ListViewMessages.LVM_SCROLL, scrollX, scrollY);

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