Windows message list

Wm_null = 0x0000,
Wm_create = 0 x0 0001,
Wm_destroy = 0x0002,
Wm_move = 0x0003,
Wm_size = 0x0005,
Wm_activate = 0x0006,
Wm_setfocus = 0x0007,
Wm_killfocus = 0x0008,
Wm_enable = 0x000a,
Wm_setredraw = 0x000b,
Wm_settext = 0x000c,
Wm_gettext = 0x000d,
Wm_gettextlength = 0x000e,
Wm_paint = 0x000f,
Wm_close = 0x0010,
Wm_queryendsession = 0x0011,
Wm_quit = 0x0012,
Wm_queryopen = 0x0013,
Wm_erasebkgnd = 0x0014,
Wm_syscolorchange = 0x0015,
Wm_endsession = 0x0016,
Wm_showwindow = 0x0018,
Wm_wininichange = 0x001a,
Wm_settingchange = 0x001a,
Wm_devmodechange = 0x001b,
Wm_activateapp = 0x001c,
Wm_fontchange = 0x001d,
Wm_timechange = 0x001e,
Wm_cancelmode = 0x001f,
Wm_setcursor = 0x0020,
Wm_mouseactivate = 0x0021,
Wm_childactivate = 0x0022,
Wm_queuesync = 0x0023,
Wm_getminmaxinfo = 0x0024,
Wm_painticon = 0x0026,
Wm_iconerasebkgnd = 0x0027,
Wm_nextdlgctl = 0 x0028,
Wm_spoolerstatus = 0x002a,
Wm_drawitem = 0x002b,
Wm_measureitem = 0x002c,
Wm_deleteitem = 0x002d,
Wm_vkeytoitem = 0x002e,
Wm_chartoitem = 0x002f,
Wm_setfont = 0x0030,
Wm_getfont = 0x0031,
Wm_sethotkey = 0x0032,
Wm_gethotkey = 0x0033,
Wm_querydragicon = 0x0037,
Wm_compareitem= 0x0039,
Wm_getobject = 0x003d,
Wm_compacting = 0x0041,
Wm_commnotify = 0x0044,
Wm_windowposchanging = 0x0046,
Wm_windowposchanged = 0x0047,
Wm_power = 0x0048,
Wm_copydata = 0x004a,
Wm_canceljournal = 0x004b,
Wm_notify = 0x004e,
Wm_inputlangchangerequest = 0x0050,
Wm_inputlangchange = 0x0051,
Wm_tcard = 0x0052,
Wm_help = 0x0053,
Wm_userchange = 0x0054,
Wm_policyformat = 0x0055,
Wm_contextmenu = 0x007b,
Wm_stylechanging = 0x007c,
Wm_stylechanged = 0x007d,
Wm_displaychange = 0x007e,
Wm_geticon = 0x007f,
Wm_seticon = 0x0080,
Wm_nccreate = 0x0081,
Wm_ncdestroy = 0x0082,
Wm_nccalcsize = 0x0083,
Wm_nchittest = 0x0084,
Wm_ncpaint = 0x0085,
Wm_ncactivate = 0x0086,
Wm_getdlgcode = 0x0087,
Wm_syncpaint = 0x0088,
Wm_ncmousemove = 0x00a0,
Wm_nclbuttondown = 0x00a1,
Wm_nclbuttonup = 0x00a2,
Wm_nclbuttondblclk = 0x00a3,
Wm_ncrbuttondown = 0x00a4,
Wm_ncrbuttonup = 0x00a5,
Wm_ncrbuttondblclk = 0x00a6,
Wm_ncmbuttondown = 0x00a7,
Wm_ncmbuttonup = 0x00a8,
Wm_ncmbuttondblclk = 0x00a9,
Wm_keydown = 0x0100,
Wm_keyup-to-date = 0x0101,
Wm_char = 0x0102,
Wm_deadchar = 0x0103,
Wm_syskeydown = 0x0104,
Wm_syskeyup = 0x0105,
Wm_syschar = 0x0106,
Wm_sysdeadchar = 0x0107,
Wm_keylast = 0x0108,
Wm_ime_startcomposition = 0x010d,
Wm_ime_endcomposition = 0x010e,
Wm_ime_composition = 0x010f,
Wm_ime_keylast = 0x010f,
Wm_initdialog = 0x0110,
Wm_command = 0x0111,
Wm_syscommand = 0x0112,
Wm_timer = 0x0113,
Wm_hscroll = 0x0114,
Wm_vscroll = 0x0115,
Wm_initmenu = 0x0116,
Wm_initmenupopup = 0x0117,
Wm_menuselect = 0x011f,
Wm_menuchar = 0x0120,
Wm_enteridle= 0x0121,
Wm_menurbuttonup = 0x0122,
Wm_menudrag = 0x0123,
Wm_menugetobject = 0x0124,
Wm_uninitmenupopup = 0x0125,
Wm_menucommand = 0x0126,
Wm_ctlcolormsgbox = 0x0132,
Wm_ctlcoloredit = 0x0133,
Wm_ctlcolorlistbox = 0x0134,
Wm_ctlcolorbtn = 0 x0135,
Wm_ctlcolordlg = 0x0136,
Wm_ctlcolorscrollbar = 0x0137,
Wm_ctlcolorstatic = 0x0138,
Wm_mousemove = 0x0200,
Wm_lbuttondown = 0x0201,
Wm_lbuttonup = 0x0202,
Wm_lbuttondblclk = 0x0203,
Wm_rbuttondown = 0x0204,
Wm_rbuttonup = 0x0205,
Wm_rbuttondblclk = 0x0206,
Wm_mbuttondown = 0x0207,
Wm_mbuttonup = 0x0208,
Wm_mbuttondblclk = 0x0209,
Wm_mousewheel = 0x020a,
Wm_parentnotify = 0x0210,
Wm_entermenuloop = 0x0211,
Wm_exitmenuloop = 0x0212,
Wm_nextmenu = 0x0213,
Wm_sizing = 0x0214,
Wm_capturechanged = 0x0215,
Wm_moving = 0x0216,
Wm_devicechange = 0x0219,
Wm_mdicreate = 0x0220,
Wm_mdestroy = 0x0221,
Wm_mdiactivate = 0x0222,
Wm_mdirectstore = 0x0223,
Wm_mdinext = 0x0224,
Wm_mdimaximize = 0x0225,
Wm_mditile = 0x0226,
Wm_mdicascade = 0x0227,
Wm_mdiiconarrange = 0x0228,
Wm_mdigetactive = 0x0229,
Wm_mdisetmenu = 0x0230,
Wm_entersizemove = 0x0231,
Wm_exitsizemove = 0x0232,
Wm_dropfiles = 0x0233,
Wm_mdirectfreshmenu = 0x0234,
Wm_ime_setcontext = 0x0281,
Wm_ime_policy = 0x0282,
Wm_ime_control = 0x0283,
Wm_ime_compositionfull = 0x0284,
Wm_ime_select = 0x0285,
Wm_ime_char = 0x0286,
Wm_ime_request = 0x0288,
Wm_ime_keydown = 0x0290,
Wm_ime_keyup = 0x0291,
Wm_mousehover = 0x02a1,
Wm_mouseleave = 0x02a3,
Wm_cut = 0 x0 0300,
Wm_copy = 0x0301,
Wm_paste = 0x0302,
Wm_clear = 0x0303,
Wm_undo = 0x0304,
Wm_renderformat = 0x0305,
Wm_renderallformats = 0x0306,
Wm_destroyclipboard = 0x0307,
Wm_drawclipboard = 0x0308,
Wm_paintclipboard = 0x0309,
Wm_vscrollclipboard = 0x030a,
Wm_sizeclipboard = 0x030b,
Wm_askcbformatname = 0x030c,
Wm_changecbchain = 0x030d,
Wm_hscrollclipboard = 0x030e,
Wm_querynewpalette = 0x030f,
Wm_paletteischanging = 0x0310,
Wm_palettechanged = 0x0311,
Wm_hotkey = 0x0312,
Wm_print = 0x0317,
Wm_printclient = 0x0318,
Wm_handheldfirst = 0x0358,
Wm_handheldlast = 0x035f,
Wm_afxfirst = 0x0360,
Wm_afxlast = 0x037f,
Wm_penwinfirst = 0x0380,
Wm_penwinlast = 0x038f,
Wm_app = 0x8000,
Wm_user = 0x0400

SC _minimize 0xf020 minimizes the Message Value
SC _maximize 0xf030 maximize Message Value

& Hf001 ~ in VB ~ & Hf008 is the constant that changes the size of the form from the left, right, top, top left, top right, bottom right, bottom right, and bottom right. That is, 0xf001 ~ in VC, C ~ 0xf008.

0xf001 left

0xf002 right

0xf003 top

0xf004 topleft

0xf005 topright

0xf006 bottom

0xf007 bottomleft

0xf008 bottomright

 

By using these constants, you can control the freely changing size of the borderless form (sendmessage (wm_syscommand, 0xf001 ))