RAD Studio VCL Reference
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Constants

The following table lists constants in this documentation.

Name 
Description 
This is constant Messages.BM_CLICK. 
This is constant Messages.BM_GETCHECK. 
This is constant Messages.BM_GETIMAGE. 
This is constant Messages.BM_GETSTATE. 
This is constant Messages.BM_SETCHECK. 
This is constant Messages.BM_SETIMAGE. 
This is constant Messages.BM_SETSTATE. 
This is constant Messages.BM_SETSTYLE. 
This is constant Messages.BN_CLICKED. 
This is constant Messages.BN_DBLCLK. 
This is constant Messages.BN_DISABLE. 
This is constant Messages.BN_DOUBLECLICKED. 
This is constant Messages.BN_HILITE. 
This is constant Messages.BN_KILLFOCUS. 
This is constant Messages.BN_PAINT. 
This is constant Messages.BN_PUSHED. 
This is constant Messages.BN_SETFOCUS. 
This is constant Messages.BN_UNHILITE. 
This is constant Messages.BN_UNPUSHED. 
This is constant Messages.CB_ADDSTRING. 
This is constant Messages.CB_DELETESTRING. 
This is constant Messages.CB_DIR. 
This is constant Messages.CB_FINDSTRING. 
This is constant Messages.CB_FINDSTRINGEXACT. 
This is constant Messages.CB_GETCOUNT. 
This is constant Messages.CB_GETCURSEL. 
This is constant Messages.CB_GETDROPPEDCONTROLRECT. 
This is constant Messages.CB_GETDROPPEDSTATE. 
This is constant Messages.CB_GETDROPPEDWIDTH. 
This is constant Messages.CB_GETEDITSEL. 
This is constant Messages.CB_GETEXTENDEDUI. 
This is constant Messages.CB_GETHORIZONTALEXTENT. 
This is constant Messages.CB_GETITEMDATA. 
This is constant Messages.CB_GETITEMHEIGHT. 
This is constant Messages.CB_GETLBTEXT. 
This is constant Messages.CB_GETLBTEXTLEN. 
This is constant Messages.CB_GETLOCALE. 
This is constant Messages.CB_GETTOPINDEX. 
This is constant Messages.CB_INITSTORAGE. 
This is constant Messages.CB_INSERTSTRING. 
This is constant Messages.CB_LIMITTEXT. 
This is constant Messages.CB_MSGMAX. 
This is constant Messages.CB_RESETCONTENT. 
This is constant Messages.CB_SELECTSTRING. 
This is constant Messages.CB_SETCURSEL. 
This is constant Messages.CB_SETDROPPEDWIDTH. 
This is constant Messages.CB_SETEDITSEL. 
This is constant Messages.CB_SETEXTENDEDUI. 
This is constant Messages.CB_SETHORIZONTALEXTENT. 
This is constant Messages.CB_SETITEMDATA. 
This is constant Messages.CB_SETITEMHEIGHT. 
This is constant Messages.CB_SETLOCALE. 
This is constant Messages.CB_SETTOPINDEX. 
This is constant Messages.CB_SHOWDROPDOWN. 
This is constant Messages.CBN_CLOSEUP. 
This is constant Messages.CBN_DBLCLK. 
This is constant Messages.CBN_DROPDOWN. 
This is constant Messages.CBN_EDITCHANGE. 
This is constant Messages.CBN_EDITUPDATE. 
This is constant Messages.CBN_ERRSPACE. 
This is constant Messages.CBN_KILLFOCUS. 
This is constant Messages.CBN_SELCHANGE. 
This is constant Messages.CBN_SELENDCANCEL. 
This is constant Messages.CBN_SELENDOK. 
This is constant Messages.CBN_SETFOCUS. 
This is constant Messages.DM_GETDEFID. 
This is constant Messages.DM_REPOSITION. 
This is constant Messages.DM_SETDEFID. 
This is constant Messages.EM_CANUNDO. 
This is constant Messages.EM_CHARFROMPOS. 
This is constant Messages.EM_EMPTYUNDOBUFFER. 
This is constant Messages.EM_FMTLINES. 
This is constant Messages.EM_GETFIRSTVISIBLELINE. 
This is constant Messages.EM_GETHANDLE. 
This is constant Messages.EM_GETIMESTATUS. 
This is constant Messages.EM_GETLIMITTEXT. 
This is constant Messages.EM_GETLINE. 
This is constant Messages.EM_GETLINECOUNT. 
This is constant Messages.EM_GETMARGINS. 
This is constant Messages.EM_GETMODIFY. 
This is constant Messages.EM_GETPASSWORDCHAR. 
This is constant Messages.EM_GETRECT. 
This is constant Messages.EM_GETSEL. 
This is constant Messages.EM_GETTHUMB. 
This is constant Messages.EM_GETWORDBREAKPROC. 
This is constant Messages.EM_LIMITTEXT. 
This is constant Messages.EM_LINEFROMCHAR. 
This is constant Messages.EM_LINEINDEX. 
This is constant Messages.EM_LINELENGTH. 
This is constant Messages.EM_LINESCROLL. 
This is constant Messages.EM_POSFROMCHAR. 
This is constant Messages.EM_REPLACESEL. 
This is constant Messages.EM_SCROLL. 
This is constant Messages.EM_SCROLLCARET. 
This is constant Messages.EM_SETHANDLE. 
This is constant Messages.EM_SETIMESTATUS. 
This is constant Messages.EM_SETLIMITTEXT. 
This is constant Messages.EM_SETMARGINS. 
This is constant Messages.EM_SETMODIFY. 
This is constant Messages.EM_SETPASSWORDCHAR. 
This is constant Messages.EM_SETREADONLY. 
This is constant Messages.EM_SETRECT. 
This is constant Messages.EM_SETRECTNP. 
This is constant Messages.EM_SETSEL. 
This is constant Messages.EM_SETTABSTOPS. 
This is constant Messages.EM_SETWORDBREAKPROC. 
This is constant Messages.EM_UNDO. 
This is constant Messages.EN_CHANGE. 
This is constant Messages.EN_ERRSPACE. 
This is constant Messages.EN_HSCROLL. 
This is constant Messages.EN_KILLFOCUS. 
This is constant Messages.EN_MAXTEXT. 
This is constant Messages.EN_SETFOCUS. 
This is constant Messages.EN_UPDATE. 
This is constant Messages.EN_VSCROLL. 
This is constant Messages.LB_ADDFILE. 
This is constant Messages.LB_ADDSTRING. 
This is constant Messages.LB_DELETESTRING. 
This is constant Messages.LB_DIR. 
This is constant Messages.LB_FINDSTRING. 
This is constant Messages.LB_FINDSTRINGEXACT. 
This is constant Messages.LB_GETANCHORINDEX. 
This is constant Messages.LB_GETCARETINDEX. 
This is constant Messages.LB_GETCOUNT. 
This is constant Messages.LB_GETCURSEL. 
This is constant Messages.LB_GETHORIZONTALEXTENT. 
This is constant Messages.LB_GETITEMDATA. 
This is constant Messages.LB_GETITEMHEIGHT. 
This is constant Messages.LB_GETITEMRECT. 
This is constant Messages.LB_GETLOCALE. 
This is constant Messages.LB_GETSEL. 
This is constant Messages.LB_GETSELCOUNT. 
This is constant Messages.LB_GETSELITEMS. 
This is constant Messages.LB_GETTEXT. 
This is constant Messages.LB_GETTEXTLEN. 
This is constant Messages.LB_GETTOPINDEX. 
This is constant Messages.LB_INITSTORAGE. 
This is constant Messages.LB_INSERTSTRING. 
This is constant Messages.LB_ITEMFROMPOINT. 
This is constant Messages.LB_MSGMAX. 
This is constant Messages.LB_RESETCONTENT. 
This is constant Messages.LB_SELECTSTRING. 
This is constant Messages.LB_SELITEMRANGE. 
This is constant Messages.LB_SELITEMRANGEEX. 
This is constant Messages.LB_SETANCHORINDEX. 
This is constant Messages.LB_SETCARETINDEX. 
This is constant Messages.LB_SETCOLUMNWIDTH. 
This is constant Messages.LB_SETCOUNT. 
This is constant Messages.LB_SETCURSEL. 
This is constant Messages.LB_SETHORIZONTALEXTENT. 
This is constant Messages.LB_SETITEMDATA. 
This is constant Messages.LB_SETITEMHEIGHT. 
This is constant Messages.LB_SETLOCALE. 
This is constant Messages.LB_SETSEL. 
This is constant Messages.LB_SETTABSTOPS. 
This is constant Messages.LB_SETTOPINDEX. 
This is constant Messages.LBN_DBLCLK. 
This is constant Messages.LBN_ERRSPACE. 
This is constant Messages.LBN_KILLFOCUS. 
This is constant Messages.LBN_SELCANCEL. 
This is constant Messages.LBN_SELCHANGE. 
This is constant Messages.LBN_SETFOCUS. 
This is constant Messages.PSM_PAGEINFO. 
This is constant Messages.PSM_SHEETINFO. 
This is constant Messages.SBM_ENABLE_ARROWS. 
This is constant Messages.SBM_GETPOS. 
This is constant Messages.SBM_GETRANGE. 
This is constant Messages.SBM_GETSCROLLINFO. 
This is constant Messages.SBM_SETPOS. 
This is constant Messages.SBM_SETRANGE. 
This is constant Messages.SBM_SETRANGEREDRAW. 
This is constant Messages.SBM_SETSCROLLINFO. 
This is constant Messages.WM_ACTIVATE. 
This is constant Messages.WM_ACTIVATEAPP. 
This is constant Messages.WM_APP. 
This is constant Messages.WM_APPCOMMAND. 
This is constant Messages.WM_ASKCBFORMATNAME. 
This is constant Messages.WM_CANCELJOURNAL. 
This is constant Messages.WM_CANCELMODE. 
This is constant Messages.WM_CAPTURECHANGED. 
This is constant Messages.WM_CHANGECBCHAIN. 
This is constant Messages.WM_CHANGEUISTATE. 
This is constant Messages.WM_CHAR. 
This is constant Messages.WM_CHARTOITEM. 
This is constant Messages.WM_CHILDACTIVATE. 
This is constant Messages.WM_CLEAR. 
This is constant Messages.WM_CLOSE. 
This is constant Messages.WM_COALESCE_FIRST. 
This is constant Messages.WM_COALESCE_LAST. 
This is constant Messages.WM_COMMAND. 
This is constant Messages.WM_COMMNOTIFY. 
This is constant Messages.WM_COMPACTING. 
This is constant Messages.WM_COMPAREITEM. 
This is constant Messages.WM_CONTEXTMENU. 
This is constant Messages.WM_COPY. 
This is constant Messages.WM_COPYDATA. 
This is constant Messages.WM_CREATE. 
This is constant Messages.WM_CTLCOLOR. 
This is constant Messages.WM_CTLCOLORBTN. 
This is constant Messages.WM_CTLCOLORDLG. 
This is constant Messages.WM_CTLCOLOREDIT. 
This is constant Messages.WM_CTLCOLORLISTBOX. 
This is constant Messages.WM_CTLCOLORMSGBOX. 
This is constant Messages.WM_CTLCOLORSCROLLBAR. 
This is constant Messages.WM_CTLCOLORSTATIC. 
This is constant Messages.WM_CUT. 
This is constant Messages.WM_DDE_ACK. 
This is constant Messages.WM_DDE_ADVISE. 
This is constant Messages.WM_DDE_DATA. 
This is constant Messages.WM_DDE_EXECUTE. 
This is constant Messages.WM_DDE_FIRST. 
This is constant Messages.WM_DDE_INITIATE. 
This is constant Messages.WM_DDE_LAST. 
This is constant Messages.WM_DDE_POKE. 
This is constant Messages.WM_DDE_REQUEST. 
This is constant Messages.WM_DDE_TERMINATE. 
This is constant Messages.WM_DDE_UNADVISE. 
This is constant Messages.WM_DEADCHAR. 
This is constant Messages.WM_DELETEITEM. 
This is constant Messages.WM_DESTROY. 
This is constant Messages.WM_DESTROYCLIPBOARD. 
This is constant Messages.WM_DEVICECHANGE. 
This is constant Messages.WM_DEVMODECHANGE. 
This is constant Messages.WM_DISPLAYCHANGE. 
This is constant Messages.WM_DRAWCLIPBOARD. 
This is constant Messages.WM_DRAWITEM. 
This is constant Messages.WM_DROPFILES. 
This is constant Messages.WM_DWMCOLORIZATIONCOLORCHANGED. 
This is constant Messages.WM_DWMCOMPOSITIONCHANGED. 
This is constant Messages.WM_DWMNCRENDERINGCHANGED. 
This is constant Messages.WM_DWMWINDOWMAXIMIZEDCHANGE. 
This is constant Messages.WM_ENABLE. 
This is constant Messages.WM_ENDSESSION. 
This is constant Messages.WM_ENTERIDLE. 
This is constant Messages.WM_ENTERMENULOOP. 
This is constant Messages.WM_ENTERSIZEMOVE. 
This is constant Messages.WM_ERASEBKGND. 
This is constant Messages.WM_EXITMENULOOP. 
This is constant Messages.WM_EXITSIZEMOVE. 
This is constant Messages.WM_FONTCHANGE. 
This is constant Messages.WM_GETDLGCODE. 
This is constant Messages.WM_GETFONT. 
This is constant Messages.WM_GETHOTKEY. 
This is constant Messages.WM_GETICON. 
This is constant Messages.WM_GETMINMAXINFO. 
This is constant Messages.WM_GETOBJECT. 
This is constant Messages.WM_GETTEXT. 
This is constant Messages.WM_GETTEXTLENGTH. 
This is constant Messages.WM_HANDHELDFIRST. 
This is constant Messages.WM_HANDHELDLAST. 
This is constant Messages.WM_HELP. 
This is constant Messages.WM_HOTKEY. 
This is constant Messages.WM_HSCROLL. 
This is constant Messages.WM_HSCROLLCLIPBOARD. 
This is constant Messages.WM_ICONERASEBKGND. 
This is constant Messages.WM_IME_CHAR. 
This is constant Messages.WM_IME_COMPOSITION. 
This is constant Messages.WM_IME_COMPOSITIONFULL. 
This is constant Messages.WM_IME_CONTROL. 
This is constant Messages.WM_IME_ENDCOMPOSITION. 
This is constant Messages.WM_IME_KEYDOWN. 
This is constant Messages.WM_IME_KEYLAST. 
This is constant Messages.WM_IME_KEYUP. 
This is constant Messages.WM_IME_NOTIFY. 
This is constant Messages.WM_IME_REQUEST. 
This is constant Messages.WM_IME_SELECT. 
This is constant Messages.WM_IME_SETCONTEXT. 
This is constant Messages.WM_IME_STARTCOMPOSITION. 
This is constant Messages.WM_INITDIALOG. 
This is constant Messages.WM_INITMENU. 
This is constant Messages.WM_INITMENUPOPUP. 
This is constant Messages.WM_INPUT. 
This is constant Messages.WM_INPUTLANGCHANGE. 
This is constant Messages.WM_INPUTLANGCHANGEREQUEST. 
This is constant Messages.WM_KEYDOWN. 
This is constant Messages.WM_KEYFIRST. 
This is constant Messages.WM_KEYLAST. 
This is constant Messages.WM_KEYUP. 
This is constant Messages.WM_KILLFOCUS. 
This is constant Messages.WM_LBUTTONDBLCLK. 
This is constant Messages.WM_LBUTTONDOWN. 
This is constant Messages.WM_LBUTTONUP. 
This is constant Messages.WM_MBUTTONDBLCLK. 
This is constant Messages.WM_MBUTTONDOWN. 
This is constant Messages.WM_MBUTTONUP. 
This is constant Messages.WM_MDIACTIVATE. 
This is constant Messages.WM_MDICASCADE. 
This is constant Messages.WM_MDICREATE. 
This is constant Messages.WM_MDIDESTROY. 
This is constant Messages.WM_MDIGETACTIVE. 
This is constant Messages.WM_MDIICONARRANGE. 
This is constant Messages.WM_MDIMAXIMIZE. 
This is constant Messages.WM_MDINEXT. 
This is constant Messages.WM_MDIREFRESHMENU. 
This is constant Messages.WM_MDIRESTORE. 
This is constant Messages.WM_MDISETMENU. 
This is constant Messages.WM_MDITILE. 
This is constant Messages.WM_MEASUREITEM. 
This is constant Messages.WM_MENUCHAR. 
This is constant Messages.WM_MENUCOMMAND. 
This is constant Messages.WM_MENUDRAG. 
This is constant Messages.WM_MENUGETOBJECT. 
This is constant Messages.WM_MENURBUTTONUP. 
This is constant Messages.WM_MENUSELECT. 
This is constant Messages.WM_MOUSEACTIVATE. 
This is constant Messages.WM_MOUSEFIRST. 
This is constant Messages.WM_MOUSEHOVER. 
This is constant Messages.WM_MOUSELAST. 
This is constant Messages.WM_MOUSELEAVE. 
This is constant Messages.WM_MOUSEMOVE. 
This is constant Messages.WM_MOUSEWHEEL. 
This is constant Messages.WM_MOVE. 
This is constant Messages.WM_MOVING. 
This is constant Messages.WM_NCACTIVATE. 
This is constant Messages.WM_NCCALCSIZE. 
This is constant Messages.WM_NCCREATE. 
This is constant Messages.WM_NCDESTROY. 
This is constant Messages.WM_NCHITTEST. 
This is constant Messages.WM_NCLBUTTONDBLCLK. 
This is constant Messages.WM_NCLBUTTONDOWN. 
This is constant Messages.WM_NCLBUTTONUP. 
This is constant Messages.WM_NCMBUTTONDBLCLK. 
This is constant Messages.WM_NCMBUTTONDOWN. 
This is constant Messages.WM_NCMBUTTONUP. 
This is constant Messages.WM_NCMOUSEHOVER. 
This is constant Messages.WM_NCMOUSELEAVE. 
This is constant Messages.WM_NCMOUSEMOVE. 
This is constant Messages.WM_NCPAINT. 
This is constant Messages.WM_NCRBUTTONDBLCLK. 
This is constant Messages.WM_NCRBUTTONDOWN. 
This is constant Messages.WM_NCRBUTTONUP. 
This is constant Messages.WM_NCXBUTTONDBLCLK. 
This is constant Messages.WM_NCXBUTTONDOWN. 
This is constant Messages.WM_NCXBUTTONUP. 
This is constant Messages.WM_NEXTDLGCTL. 
This is constant Messages.WM_NEXTMENU. 
This is constant Messages.WM_NOTIFY. 
This is constant Messages.WM_NOTIFYFORMAT. 
This is constant Messages.WM_NULL. 
This is constant Messages.WM_PAINT. 
This is constant Messages.WM_PAINTCLIPBOARD. 
This is constant Messages.WM_PAINTICON. 
This is constant Messages.WM_PALETTECHANGED. 
This is constant Messages.WM_PALETTEISCHANGING. 
This is constant Messages.WM_PARENTNOTIFY. 
This is constant Messages.WM_PASTE. 
This is constant Messages.WM_PENWINFIRST. 
This is constant Messages.WM_PENWINLAST. 
This is constant Messages.WM_POWER. 
This is constant Messages.WM_POWERBROADCAST. 
This is constant Messages.WM_PRINT. 
This is constant Messages.WM_PRINTCLIENT. 
This is constant Messages.WM_QUERYDRAGICON. 
This is constant Messages.WM_QUERYENDSESSION. 
This is constant Messages.WM_QUERYNEWPALETTE. 
This is constant Messages.WM_QUERYOPEN. 
This is constant Messages.WM_QUERYUISTATE. 
This is constant Messages.WM_QUEUESYNC. 
This is constant Messages.WM_QUIT. 
This is constant Messages.WM_RBUTTONDBLCLK. 
This is constant Messages.WM_RBUTTONDOWN. 
This is constant Messages.WM_RBUTTONUP. 
This is constant Messages.WM_RENDERALLFORMATS. 
This is constant Messages.WM_RENDERFORMAT. 
This is constant Messages.WM_SETCURSOR. 
This is constant Messages.WM_SETFOCUS. 
This is constant Messages.WM_SETFONT. 
This is constant Messages.WM_SETHOTKEY. 
This is constant Messages.WM_SETICON. 
This is constant Messages.WM_SETREDRAW. 
This is constant Messages.WM_SETTEXT. 
This is constant Messages.WM_SETTINGCHANGE. 
This is constant Messages.WM_SHOWWINDOW. 
This is constant Messages.WM_SIZE. 
This is constant Messages.WM_SIZECLIPBOARD. 
This is constant Messages.WM_SIZING. 
This is constant Messages.WM_SPOOLERSTATUS. 
This is constant Messages.WM_STYLECHANGED. 
This is constant Messages.WM_STYLECHANGING. 
This is constant Messages.WM_SYSCHAR. 
This is constant Messages.WM_SYSCOLORCHANGE. 
This is constant Messages.WM_SYSCOMMAND. 
This is constant Messages.WM_SYSDEADCHAR. 
This is constant Messages.WM_SYSKEYDOWN. 
This is constant Messages.WM_SYSKEYUP. 
This is constant Messages.WM_SYSTEMERROR. 
This is constant Messages.WM_TABLET_FIRST. 
This is constant Messages.WM_TABLET_LAST. 
This is constant Messages.WM_TCARD. 
This is constant Messages.WM_THEMECHANGED. 
This is constant Messages.WM_TIMECHANGE. 
This is constant Messages.WM_TIMER. 
This is constant Messages.WM_UNDO. 
This is constant Messages.WM_UNICHAR. 
This is constant Messages.WM_UNINITMENUPOPUP. 
This is constant Messages.WM_UPDATEUISTATE. 
This is constant Messages.WM_USER. 
This is constant Messages.WM_USERCHANGED. 
This is constant Messages.WM_VKEYTOITEM. 
This is constant Messages.WM_VSCROLL. 
This is constant Messages.WM_VSCROLLCLIPBOARD. 
This is constant Messages.WM_WINDOWPOSCHANGED. 
This is constant Messages.WM_WINDOWPOSCHANGING. 
This is constant Messages.WM_WININICHANGE. 
This is constant Messages.WM_WTSSESSION_CHANGE. 
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