X Protocol Request Codes

These tables list the names and codes for the X Window Systems protocol's requests. The left table is sorted numerically by request code and the right table is sorted alphabetically by request name.

These tables should help X Window System programmers debug X protocol error messages. A tutorial on debugging X protocol errors is available separately. Tables mapping X protocol requests to Xlib functions and tables of event and error codes are also available.

Sorted by request code Request Name Code CreateWindow 1 ChangeWindowAttributes 2 GetWindowAttributes 3 DestroyWindow 4 DestroySubwindows 5 ChangeSaveSet 6 ReparentWindow 7 MapWindow 8 MapSubwindows 9 UnmapWindow 10 UnmapSubwindows 11 ConfigureWindow 12 CirculateWindow 13 GetGeometry 14 QueryTree 15 InternAtom 16 GetAtomName 17 ChangeProperty 18 DeleteProperty 19 GetProperty 20 ListProperties 21 SetSelectionOwner 22 GetSelectionOwner 23 ConvertSelection 24 SendEvent 25 GrabPointer 26 UngrabPointer 27 GrabButton 28 UngrabButton 29 ChangeActivePointerGrab 30 GrabKeyboard 31 UngrabKeyboard 32 GrabKey 33 UngrabKey 34 AllowEvents 35 GrabServer 36 UngrabServer 37 QueryPointer 38 GetMotionEvents 39 TranslateCoords 40 WarpPointer 41 SetInputFocus 42 GetInputFocus 43 QueryKeymap 44 OpenFont 45 CloseFont 46 QueryFont 47 QueryTextExtents 48 ListFonts 49 ListFontsWithInfo 50 SetFontPath 51 GetFontPath 52 CreatePixmap 53 FreePixmap 54 CreateGC 55 ChangeGC 56 CopyGC 57 SetDashes 58 SetClipRectangles 59 FreeGC 60 ClearArea 61 CopyArea 62 CopyPlane 63 PolyPoint 64 PolyLine 65 PolySegment 66 PolyRectangle 67 PolyArc 68 FillPoly 69 PolyFillRectangle 70 PolyFillArc 71 PutImage 72 GetImage 73 PolyText8 74 PolyText16 75 ImageText8 76 ImageText16 77 CreateColormap 78 FreeColormap 79 CopyColormapAndFree 80 InstallColormap 81 UninstallColormap 82 ListInstalledColormaps 83 AllocColor 84 AllocNamedColor 85 AllocColorCells 86 AllocColorPlanes 87 FreeColors 88 StoreColors 89 StoreNamedColor 90 QueryColors 91 LookupColor 92 CreateCursor 93 CreateGlyphCursor 94 FreeCursor 95 RecolorCursor 96 QueryBestSize 97 QueryExtension 98 ListExtensions 99 ChangeKeyboardMapping 100 GetKeyboardMapping 101 ChangeKeyboardControl 102 GetKeyboardControl 103 Bell 104 ChangePointerControl 105 GetPointerControl 106 SetScreenSaver 107 GetScreenSaver 108 ChangeHosts 109 ListHosts 110 SetAccessControl 111 SetCloseDownMode 112 KillClient 113 RotateProperties 114 ForceScreenSaver 115 SetPointerMapping 116 GetPointerMapping 117 SetModifierMapping 118 GetModifierMapping 119 NoOperation 127

Sorted by request name Request Name Code AllocColor 84 AllocColorCells 86 AllocColorPlanes 87 AllocNamedColor 85 AllowEvents 35 Bell 104 ChangeActivePointerGrab 30 ChangeGC 56 ChangeHosts 109 ChangeKeyboardControl 102 ChangeKeyboardMapping 100 ChangePointerControl 105 ChangeProperty 18 ChangeSaveSet 6 ChangeWindowAttributes 2 CirculateWindow 13 ClearArea 61 CloseFont 46 ConfigureWindow 12 ConvertSelection 24 CopyArea 62 CopyColormapAndFree 80 CopyGC 57 CopyPlane 63 CreateColormap 78 CreateCursor 93 CreateGC 55 CreateGlyphCursor 94 CreatePixmap 53 CreateWindow 1 DeleteProperty 19 DestroySubwindows 5 DestroyWindow 4 FillPoly 69 ForceScreenSaver 115 FreeColormap 79 FreeColors 88 FreeCursor 95 FreeGC 60 FreePixmap 54 GetAtomName 17 GetFontPath 52 GetGeometry 14 GetImage 73 GetInputFocus 43 GetKeyboardControl 103 GetKeyboardMapping 101 GetModifierMapping 119 GetMotionEvents 39 GetPointerControl 106 GetPointerMapping 117 GetProperty 20 GetScreenSaver 108 GetSelectionOwner 23 GetWindowAttributes 3 GrabButton 28 GrabKey 33 GrabKeyboard 31 GrabPointer 26 GrabServer 36 ImageText16 77 ImageText8 76 InstallColormap 81 InternAtom 16 KillClient 113 ListExtensions 99 ListFonts 49 ListFontsWithInfo 50 ListHosts 110 ListInstalledColormaps 83 ListProperties 21 LookupColor 92 MapSubwindows 9 MapWindow 8 NoOperation 127 OpenFont 45 PolyArc 68 PolyFillArc 71 PolyFillRectangle 70 PolyLine 65 PolyPoint 64 PolyRectangle 67 PolySegment 66 PolyText16 75 PolyText8 74 PutImage 72 QueryBestSize 97 QueryColors 91 QueryExtension 98 QueryFont 47 QueryKeymap 44 QueryPointer 38 QueryTextExtents 48 QueryTree 15 RecolorCursor 96 ReparentWindow 7 RotateProperties 114 SendEvent 25 SetAccessControl 111 SetClipRectangles 59 SetCloseDownMode 112 SetDashes 58 SetFontPath 51 SetInputFocus 42 SetModifierMapping 118 SetPointerMapping 116 SetScreenSaver 107 SetSelectionOwner 22 StoreColors 89 StoreNamedColor 90 TranslateCoords 40 UngrabButton 29 UngrabKey 34 UngrabKeyboard 32 UngrabPointer 27 UngrabServer 37 UninstallColormap 82 UnmapSubwindows 11 UnmapWindow 10 WarpPointer 41