Convert Windows Message IDs to Text
Is there a hidden/undocumented API call within Windows that will convert a message ID (e.g. WM_COMMAND) into text?
I have seen suggestions on how to achieve this usi
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Hereafter is code to convert WM_ and other Win32 message codes to text. Includes options to ignore certain messages (eg. WM_MOUSEMOVE) and to dump a list of messages received at the end. (NB: This list only goes up to 1024 (WM_USER) due to the 30K limit on this box. Also there are many duplicates in the list thereafter.)
// Usage ----- #include "win_msg.h" void ShowMessageText(UINT msg) { wchar_t str[1024]; wchar_t* win_msgtext = (wchar_t*)GetMessageText(msg); if (win_msgtext) { //printf(L"WndProc: msg = %x (%s)\n", msg, win_msgtext); wsprintf(str, L"WndProc: msg = %x (%s)\n", msg, win_msgtext); OutputDebugString(str); } } To list messages used (and generate an 'ignore' list) call: ShowUsedMessages(); // win_msg.h file ---------- #define SHOW_USED_MESSAGES 1 wchar_t* GetMessageText(unsigned int msg); #ifdef SHOW_USED_MESSAGES void ShowUsedMessages(void); #endif // win_msg.cpp ----------- #include "stdafx.h" #include "win_msg.h" // List here messages to ignore (-1 signifies end of list) // if -999 occurs at the start of the list, ALL messages except these are ignored (ie. inverts) //int msgs_to_ignore[] = { -1 }; int msgs_to_ignore[] = {//-999, 0x20, 0x84, 0xA0, 0x113, 0x200 }; // 0x0020 - WM_SETCURSOR (45) // 0x0084 - WM_NCHITTEST (26) // 0x0113 - WM_TIMER (46) // 0x0135 - WM_CTLCOLORBTN (8) // 0x0200 - WM_MOUSEFIRST (26) typedef struct { unsigned int code; wchar_t* text; } XMSGITEM; // These from https://wiki.winehq.org/List_Of_Windows_Messages XMSGITEM xmsglist[] = { { 0, L"WM_NULL"}, { 1, L"WM_CREATE" }, { 2, L"WM_DESTROY" }, { 3, L"WM_MOVE" }, { 5, L"WM_SIZE" }, { 6, L"WM_ACTIVATE" }, { 7, L"WM_SETFOCUS" }, { 8, L"WM_KILLFOCUS" }, { 10, L"WM_ENABLE" }, { 11, L"WM_SETREDRAW" }, { 12, L"WM_SETTEXT" }, { 13, L"WM_GETTEXT" }, { 14, L"WM_GETTEXTLENGTH" }, { 15, L"WM_PAINT" }, { 16, L"WM_CLOSE" }, { 17, L"WM_QUERYENDSESSION" }, { 18, L"WM_QUIT" }, { 19, L"WM_QUERYOPEN" }, { 20, L"WM_ERASEBKGND" }, { 21, L"WM_SYSCOLORCHANGE" }, { 22, L"WM_ENDSESSION" }, { 24, L"WM_SHOWWINDOW" }, { 25, L"WM_CTLCOLOR" }, { 26, L"WM_WININICHANGE" }, { 27, L"WM_DEVMODECHANGE" }, { 28, L"WM_ACTIVATEAPP" }, { 29, L"WM_FONTCHANGE" }, { 30, L"WM_TIMECHANGE" }, { 31, L"WM_CANCELMODE" }, { 32, L"WM_SETCURSOR" }, { 33, L"WM_MOUSEACTIVATE" }, { 34, L"WM_CHILDACTIVATE" }, { 35, L"WM_QUEUESYNC" }, { 36, L"WM_GETMINMAXINFO" }, { 38, L"WM_PAINTICON" }, { 39, L"WM_ICONERASEBKGND" }, { 40, L"WM_NEXTDLGCTL" }, { 42, L"WM_SPOOLERSTATUS" }, { 43, L"WM_DRAWITEM" }, { 44, L"WM_MEASUREITEM" }, { 45, L"WM_DELETEITEM" }, { 46, L"WM_VKEYTOITEM" }, { 47, L"WM_CHARTOITEM" }, { 48, L"WM_SETFONT" }, { 49, L"WM_GETFONT" }, { 50, L"WM_SETHOTKEY" }, { 51, L"WM_GETHOTKEY" }, { 55, L"WM_QUERYDRAGICON" }, { 57, L"WM_COMPAREITEM" }, { 61, L"WM_GETOBJECT" }, { 65, L"WM_COMPACTING" }, { 68, L"WM_COMMNOTIFY" }, { 70, L"WM_WINDOWPOSCHANGING" }, { 71, L"WM_WINDOWPOSCHANGED" }, { 72, L"WM_POWER" }, { 73, L"WM_COPYGLOBALDATA" }, { 74, L"WM_COPYDATA" }, { 75, L"WM_CANCELJOURNAL" }, { 78, L"WM_NOTIFY" }, { 80, L"WM_INPUTLANGCHANGEREQUEST" }, { 81, L"WM_INPUTLANGCHANGE" }, { 82, L"WM_TCARD" }, { 83, L"WM_HELP" }, { 84, L"WM_USERCHANGED" }, { 85, L"WM_NOTIFYFORMAT" }, { 123, L"WM_CONTEXTMENU" }, { 124, L"WM_STYLECHANGING" }, { 125, L"WM_STYLECHANGED" }, { 126, L"WM_DISPLAYCHANGE" }, { 127, L"WM_GETICON" }, { 128, L"WM_SETICON" }, { 129, L"WM_NCCREATE" }, { 130, L"WM_NCDESTROY" }, { 131, L"WM_NCCALCSIZE" }, { 132, L"WM_NCHITTEST" }, { 133, L"WM_NCPAINT" }, { 134, L"WM_NCACTIVATE" }, { 135, L"WM_GETDLGCODE" }, { 136, L"WM_SYNCPAINT" }, { 160, L"WM_NCMOUSEMOVE" }, { 161, L"WM_NCLBUTTONDOWN" }, { 162, L"WM_NCLBUTTONUP" }, { 163, L"WM_NCLBUTTONDBLCLK" }, { 164, L"WM_NCRBUTTONDOWN" }, { 165, L"WM_NCRBUTTONUP" }, { 166, L"WM_NCRBUTTONDBLCLK" }, { 167, L"WM_NCMBUTTONDOWN" }, { 168, L"WM_NCMBUTTONUP" }, { 169, L"WM_NCMBUTTONDBLCLK" }, { 171, L"WM_NCXBUTTONDOWN" }, { 172, L"WM_NCXBUTTONUP" }, { 173, L"WM_NCXBUTTONDBLCLK" }, { 176, L"EM_GETSEL" }, { 177, L"EM_SETSEL" }, { 178, L"EM_GETRECT" }, { 179, L"EM_SETRECT" }, { 180, L"EM_SETRECTNP" }, { 181, L"EM_SCROLL" }, { 182, L"EM_LINESCROLL" }, { 183, L"EM_SCROLLCARET" }, { 185, L"EM_GETMODIFY" }, { 187, L"EM_SETMODIFY" }, { 188, L"EM_GETLINECOUNT" }, { 189, L"EM_LINEINDEX" }, { 190, L"EM_SETHANDLE" }, { 191, L"EM_GETHANDLE" }, { 192, L"EM_GETTHUMB" }, { 193, L"EM_LINELENGTH" }, { 194, L"EM_REPLACESEL" }, { 195, L"EM_SETFONT" }, { 196, L"EM_GETLINE" }, { 197, L"EM_LIMITTEXT" }, { 197, L"EM_SETLIMITTEXT" }, { 198, L"EM_CANUNDO" }, { 199, L"EM_UNDO" }, { 200, L"EM_FMTLINES" }, { 201, L"EM_LINEFROMCHAR" }, { 202, L"EM_SETWORDBREAK" }, { 203, L"EM_SETTABSTOPS" }, { 204, L"EM_SETPASSWORDCHAR" }, { 205, L"EM_EMPTYUNDOBUFFER" }, { 206, L"EM_GETFIRSTVISIBLELINE" }, { 207, L"EM_SETREADONLY" }, { 209, L"EM_SETWORDBREAKPROC" }, { 209, L"EM_GETWORDBREAKPROC" }, { 210, L"EM_GETPASSWORDCHAR" }, { 211, L"EM_SETMARGINS" }, { 212, L"EM_GETMARGINS" }, { 213, L"EM_GETLIMITTEXT" }, { 214, L"EM_POSFROMCHAR" }, { 215, L"EM_CHARFROMPOS" }, { 216, L"EM_SETIMESTATUS" }, { 217, L"EM_GETIMESTATUS" }, { 224, L"SBM_SETPOS" }, { 225, L"SBM_GETPOS" }, { 226, L"SBM_SETRANGE" }, { 227, L"SBM_GETRANGE" }, { 228, L"SBM_ENABLE_ARROWS" }, { 230, L"SBM_SETRANGEREDRAW" }, { 233, L"SBM_SETSCROLLINFO" }, { 234, L"SBM_GETSCROLLINFO" }, { 235, L"SBM_GETSCROLLBARINFO" }, { 240, L"BM_GETCHECK" }, { 241, L"BM_SETCHECK" }, { 242, L"BM_GETSTATE" }, { 243, L"BM_SETSTATE" }, { 244, L"BM_SETSTYLE" }, { 245, L"BM_CLICK" }, { 246, L"BM_GETIMAGE" }, { 247, L"BM_SETIMAGE" }, { 248, L"BM_SETDONTCLICK" }, { 255, L"WM_INPUT" }, { 256, L"WM_KEYDOWN" }, { 256, L"WM_KEYFIRST" }, { 257, L"WM_KEYUP" }, { 258, L"WM_CHAR" }, { 259, L"WM_DEADCHAR" }, { 260, L"WM_SYSKEYDOWN" }, { 261, L"WM_SYSKEYUP" }, { 262, L"WM_SYSCHAR" }, { 263, L"WM_SYSDEADCHAR" }, { 264, L"WM_KEYLAST" }, { 265, L"WM_UNICHAR" }, { 265, L"WM_WNT_CONVERTREQUESTEX" }, { 266, L"WM_CONVERTREQUEST" }, { 267, L"WM_CONVERTRESULT" }, { 268, L"WM_INTERIM" }, { 269, L"WM_IME_STARTCOMPOSITION" }, { 270, L"WM_IME_ENDCOMPOSITION" }, { 271, L"WM_IME_COMPOSITION" }, { 271, L"WM_IME_KEYLAST" }, { 272, L"WM_INITDIALOG" }, { 273, L"WM_COMMAND" }, { 274, L"WM_SYSCOMMAND" }, { 275, L"WM_TIMER" }, { 276, L"WM_HSCROLL" }, { 277, L"WM_VSCROLL" }, { 278, L"WM_INITMENU" }, { 279, L"WM_INITMENUPOPUP" }, { 280, L"WM_SYSTIMER" }, { 287, L"WM_MENUSELECT" }, { 288, L"WM_MENUCHAR" }, { 289, L"WM_ENTERIDLE" }, { 290, L"WM_MENURBUTTONUP" }, { 291, L"WM_MENUDRAG" }, { 292, L"WM_MENUGETOBJECT" }, { 293, L"WM_UNINITMENUPOPUP" }, { 294, L"WM_MENUCOMMAND" }, { 295, L"WM_CHANGEUISTATE" }, { 296, L"WM_UPDATEUISTATE" }, { 297, L"WM_QUERYUISTATE" }, { 306, L"WM_CTLCOLORMSGBOX" }, { 307, L"WM_CTLCOLOREDIT" }, { 308, L"WM_CTLCOLORLISTBOX" }, { 309, L"WM_CTLCOLORBTN" }, { 310, L"WM_CTLCOLORDLG" }, { 311, L"WM_CTLCOLORSCROLLBAR" }, { 312, L"WM_CTLCOLORSTATIC" }, { 512, L"WM_MOUSEFIRST" }, { 512, L"WM_MOUSEMOVE" }, { 513, L"WM_LBUTTONDOWN" }, { 514, L"WM_LBUTTONUP" }, { 515, L"WM_LBUTTONDBLCLK" }, { 516, L"WM_RBUTTONDOWN" }, { 517, L"WM_RBUTTONUP" }, { 518, L"WM_RBUTTONDBLCLK" }, { 519, L"WM_MBUTTONDOWN" }, { 520, L"WM_MBUTTONUP" }, { 521, L"WM_MBUTTONDBLCLK" }, { 521, L"WM_MOUSELAST" }, { 522, L"WM_MOUSEWHEEL" }, { 523, L"WM_XBUTTONDOWN" }, { 524, L"WM_XBUTTONUP" }, { 525, L"WM_XBUTTONDBLCLK" }, { 528, L"WM_PARENTNOTIFY" }, { 529, L"WM_ENTERMENULOOP" }, { 530, L"WM_EXITMENULOOP" }, { 531, L"WM_NEXTMENU" }, { 532, L"WM_SIZING" }, { 533, L"WM_CAPTURECHANGED" }, { 534, L"WM_MOVING" }, { 536, L"WM_POWERBROADCAST" }, { 537, L"WM_DEVICECHANGE" }, { 544, L"WM_MDICREATE" }, { 545, L"WM_MDIDESTROY" }, { 546, L"WM_MDIACTIVATE" }, { 547, L"WM_MDIRESTORE" }, { 548, L"WM_MDINEXT" }, { 549, L"WM_MDIMAXIMIZE" }, { 550, L"WM_MDITILE" }, { 551, L"WM_MDICASCADE" }, { 552, L"WM_MDIICONARRANGE" }, { 553, L"WM_MDIGETACTIVE" }, { 560, L"WM_MDISETMENU" }, { 561, L"WM_ENTERSIZEMOVE" }, { 562, L"WM_EXITSIZEMOVE" }, { 563, L"WM_DROPFILES" }, { 564, L"WM_MDIREFRESHMENU" }, { 640, L"WM_IME_REPORT" }, { 641, L"WM_IME_SETCONTEXT" }, { 642, L"WM_IME_NOTIFY" }, { 643, L"WM_IME_CONTROL" }, { 644, L"WM_IME_COMPOSITIONFULL" }, { 645, L"WM_IME_SELECT" }, { 646, L"WM_IME_CHAR" }, { 648, L"WM_IME_REQUEST" }, { 656, L"WM_IMEKEYDOWN" }, { 656, L"WM_IME_KEYDOWN" }, { 657, L"WM_IMEKEYUP" }, { 657, L"WM_IME_KEYUP" }, { 672, L"WM_NCMOUSEHOVER" }, { 673, L"WM_MOUSEHOVER" }, { 674, L"WM_NCMOUSELEAVE" }, { 675, L"WM_MOUSELEAVE" }, { 768, L"WM_CUT" }, { 769, L"WM_COPY" }, { 770, L"WM_PASTE" }, { 771, L"WM_CLEAR" }, { 772, L"WM_UNDO" }, { 773, L"WM_RENDERFORMAT" }, { 774, L"WM_RENDERALLFORMATS" }, { 775, L"WM_DESTROYCLIPBOARD" }, { 776, L"WM_DRAWCLIPBOARD" }, { 777, L"WM_PAINTCLIPBOARD" }, { 778, L"WM_VSCROLLCLIPBOARD" }, { 779, L"WM_SIZECLIPBOARD" }, { 780, L"WM_ASKCBFORMATNAME" }, { 781, L"WM_CHANGECBCHAIN" }, { 782, L"WM_HSCROLLCLIPBOARD" }, { 783, L"WM_QUERYNEWPALETTE" }, { 784, L"WM_PALETTEISCHANGING" }, { 785, L"WM_PALETTECHANGED" }, { 786, L"WM_HOTKEY" }, { 791, L"WM_PRINT" }, { 792, L"WM_PRINTCLIENT" }, { 793, L"WM_APPCOMMAND" }, { 856, L"WM_HANDHELDFIRST" }, { 863, L"WM_HANDHELDLAST" }, { 864, L"WM_AFXFIRST" }, { 895, L"WM_AFXLAST" }, { 896, L"WM_PENWINFIRST" }, { 897, L"WM_RCRESULT" }, { 898, L"WM_HOOKRCRESULT" }, { 899, L"WM_GLOBALRCCHANGE" }, { 899, L"WM_PENMISCINFO" }, { 900, L"WM_SKB" }, { 901, L"WM_HEDITCTL" }, { 901, L"WM_PENCTL" }, { 902, L"WM_PENMISC" }, { 903, L"WM_CTLINIT" }, { 904, L"WM_PENEVENT" }, { 911, L"WM_PENWINLAST" }, { 1024, L"WM_USER" } }; // 1003 messages #define NUM_XMSGS (sizeof(xmsglist) / sizeof(XMSGITEM)) bool ignore_msg[NUM_XMSGS]; static int xmsgs_initialized = 0; #ifdef SHOW_USED_MESSAGES int used_freq[NUM_XMSGS]; #endif //------------------------------------------------- // returns -1 if not found int msgid_to_index(unsigned int msg) { static unsigned int first, cur, last; //138nS //register unsigned int first,cur,last; //173nS // Use bchop to find message code first = 0; last = NUM_XMSGS; while (1) { cur = (first + last) / 2; if (msg < xmsglist[cur].code) { if (cur == last) return (-1); // not found else last = cur; } else { if (msg == xmsglist[cur].code) //found { return (cur); } if (cur == first) return (-1); // not found else first = cur; } } } //------------------------------------------------- #define MAX_XMIGNORES (sizeof(msgs_to_ignore) / sizeof(int)) void initialise_xmsgs(void) { int msg,index; bool invert = 0; if (msgs_to_ignore[0] == -999) invert = 1; for (int i = 0; i < NUM_XMSGS; i++) { ignore_msg[i] = invert; #ifdef SHOW_USED_MESSAGES used_freq[i] = 0; #endif } for (int i = 0; i < MAX_XMIGNORES; i++) { msg = msgs_to_ignore[i]; if (msg == -1) break; index = msgid_to_index(msg); if (index != -1) { if (index < NUM_XMSGS) { ignore_msg[index] = invert ^ 1; } else { index = NUM_XMSGS; } } } xmsgs_initialized = 1; } //------------------------------------------------- wchar_t* GetMessageText(unsigned int msg) { int index; // Setup ignore list on first call if (!xmsgs_initialized) { initialise_xmsgs(); } index = msgid_to_index(msg); if (index == -1) return (NULL);//not found - bad msg id #ifdef SHOW_USED_MESSAGES used_freq[index]++; #endif if (ignore_msg[index]) { return (NULL); } return (xmsglist[index].text); } //------------------------------------------------- #ifdef SHOW_USED_MESSAGES void ShowUsedMessages(void) { wchar_t str[1024]; wchar_t* p = str; int count = 0; int lastmsg; // Find last message - to exclude ',' at end for (int i = 0; i < NUM_XMSGS; i++) { if (used_freq[i]) lastmsg = i; } // Pass 1 - output table for inclusion OutputDebugString(L"\nint msgs_to_ignore[] = {\n"); for (int i = 0; i < NUM_XMSGS; i++) { if (used_freq[i]) { p += wsprintf(p, L"0x%X", xmsglist[i].code); count++; if (i == lastmsg) count = 8; else *p++ = ','; if (count >= 8) { *p++ = '\n'; *p++ = '\0'; OutputDebugString(str); p = str; count = 0; } } } OutputDebugString(L"};\n"); // Pass 2 - add message text and frequencies for (int i = 0; i < NUM_XMSGS; i++) { if (used_freq[i]) { wsprintf(str, L"// 0x%04X - %s (%d)\n", xmsglist[i].code, xmsglist[i].text, used_freq[i]); OutputDebugString(str); } } } #endif讨论(0) -
In visual studio, you can add
uMsg,wmin command window or immediate window to get the string representation of the message ID given byuMsg.source : http://www.codeguru.com/cpp/v-s/debug/article.php/c1267/Convert-message-ID-to-a-string.htm (comments section)
PS: This is same link as mentioned in jack's answer. A user had commented there on the link. This technique has helped me very much in debugging Windows messages (no modification and recompilation of code is required), and therefore merits a separate answer.
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Spy++ has a huge message ID lookup table inside its source.
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