The behaviour of the interfaces in this library is specified by the following Standards.
| X11R6.4 Xlib - C library |
Table A-1. libX11 Function Interfaces
| XActivateScreenSaver [1] | XIfEvent [1] | XcmsCIELabQueryMinL [1] |
| XAddConnectionWatch [1] | XImageByteOrder [1] | XcmsCIELabToCIEXYZ [1] |
| XAddExtension [1] | XInitExtension [1] | XcmsCIELabWhiteShiftColors [1] |
| XAddHost [1] | XInitImage [1] | XcmsCIELuvClipL [1] |
| XAddHosts [1] | XInitThreads [1] | XcmsCIELuvClipLuv [1] |
| XAddPixel [1] | XInsertModifiermapEntry [1] | XcmsCIELuvClipuv [1] |
| XAddToExtensionList [1] | XInstallColormap [1] | XcmsCIELuvQueryMaxC [1] |
| XAddToSaveSet [1] | XInternAtom [1] | XcmsCIELuvQueryMaxL [1] |
| XAllPlanes [1] | XInternAtoms [1] | XcmsCIELuvQueryMaxLC [1] |
| XAllocClassHint [1] | XInternalConnectionNumbers [1] | XcmsCIELuvQueryMinL [1] |
| XAllocColor [1] | XIntersectRegion [1] | XcmsCIELuvToCIEuvY [1] |
| XAllocColorCells [1] | XKeycodeToKeysym [1] | XcmsCIELuvWhiteShiftColors [1] |
| XAllocColorPlanes [1] | XKeysymToKeycode [1] | XcmsCIEXYZToCIELab [1] |
| XAllocIconSize [1] | XKeysymToString [1] | XcmsCIEXYZToCIEuvY [1] |
| XAllocNamedColor [1] | XKillClient [1] | XcmsCIEXYZToCIExyY [1] |
| XAllocSizeHints [1] | XLastKnownRequestProcessed [1] | XcmsCIEXYZToRGBi [1] |
| XAllocStandardColormap [1] | XListDepths [1] | XcmsCIEuvYToCIELuv [1] |
| XAllocWMHints [1] | XListExtensions [1] | XcmsCIEuvYToCIEXYZ [1] |
| XAllowEvents [1] | XListFonts [1] | XcmsCIEuvYToTekHVC [1] |
| XAutoRepeatOff [1] | XListFontsWithInfo [1] | XcmsCIExyYToCIEXYZ [1] |
| XAutoRepeatOn [1] | XListHosts [1] | XcmsClientWhitePointOfCCC [1] |
| XBaseFontNameListOfFontSet [1] | XListInstalledColormaps [1] | XcmsConvertColors [1] |
| XBell [1] | XListPixmapFormats [1] | XcmsCreateCCC [1] |
| XBitmapBitOrder [1] | XListProperties [1] | XcmsDefaultCCC [1] |
| XBitmapPad [1] | XLoadFont [1] | XcmsDisplayOfCCC [1] |
| XBitmapUnit [1] | XLoadQueryFont [1] | XcmsFormatOfPrefix [1] |
| XBlackPixel [1] | XLocaleOfFontSet [1] | XcmsFreeCCC [1] |
| XBlackPixelOfScreen [1] | XLocaleOfIM [1] | XcmsLookupColor [1] |
| XCellsOfScreen [1] | XLocaleOfOM [1] | XcmsPrefixOfFormat [1] |
| XChangeActivePointerGrab [1] | XLockDisplay [1] | XcmsQueryBlack [1] |
| XChangeGC [1] | XLookupColor [1] | XcmsQueryBlue [1] |
| XChangeKeyboardControl [1] | XLookupKeysym [1] | XcmsQueryColor [1] |
| XChangeKeyboardMapping [1] | XLookupString [1] | XcmsQueryColors [1] |
| XChangePointerControl [1] | XLowerWindow [1] | XcmsQueryGreen [1] |
| XChangeProperty [1] | XMapRaised [1] | XcmsQueryRed [1] |
| XChangeSaveSet [1] | XMapSubwindows [1] | XcmsQueryWhite [1] |
| XChangeWindowAttributes [1] | XMapWindow [1] | XcmsRGBToRGBi [1] |
| XCheckIfEvent [1] | XMaskEvent [1] | XcmsRGBiToCIEXYZ [1] |
| XCheckMaskEvent [1] | XMatchVisualInfo [1] | XcmsRGBiToRGB [1] |
| XCheckTypedEvent [1] | XMaxCmapsOfScreen [1] | XcmsScreenNumberOfCCC [1] |
| XCheckTypedWindowEvent [1] | XMaxRequestSize [1] | XcmsScreenWhitePointOfCCC [1] |
| XCheckWindowEvent [1] | XMinCmapsOfScreen [1] | XcmsSetCCCOfColormap [1] |
| XCirculateSubwindows [1] | XMoveResizeWindow [1] | XcmsSetCompressionProc [1] |
| XCirculateSubwindowsDown [1] | XMoveWindow [1] | XcmsSetWhiteAdjustProc [1] |
| XCirculateSubwindowsUp [1] | XNewModifiermap [1] | XcmsSetWhitePoint [1] |
| XClearArea [1] | XNextEvent [1] | XcmsStoreColor [1] |
| XClearWindow [1] | XNextRequest [1] | XcmsStoreColors [1] |
| XClipBox [1] | XNoOp [1] | XcmsTekHVCClipC [1] |
| XCloseDisplay [1] | XOMOfOC [1] | XcmsTekHVCClipV [1] |
| XCloseIM [1] | XOffsetRegion [1] | XcmsTekHVCClipVC [1] |
| XCloseOM [1] | XOpenDisplay [1] | XcmsTekHVCQueryMaxC [1] |
| XConfigureWindow [1] | XOpenIM [1] | XcmsTekHVCQueryMaxV [1] |
| XConnectionNumber [1] | XOpenOM [1] | XcmsTekHVCQueryMaxVC [1] |
| XContextDependentDrawing [1] | XParseColor [1] | XcmsTekHVCQueryMaxVSamples [1] |
| XContextualDrawing [1] | XParseGeometry [1] | XcmsTekHVCQueryMinV [1] |
| XConvertCase [1] | XPeekEvent [1] | XcmsTekHVCToCIEuvY [1] |
| XConvertSelection [1] | XPeekIfEvent [1] | XcmsTekHVCWhiteShiftColors [1] |
| XCopyArea [1] | XPending [1] | XcmsVisualOfCCC [1] |
| XCopyColormapAndFree [1] | XPlanesOfScreen [1] | XkbAllocClientMap [1] |
| XCopyGC [1] | XPointInRegion [1] | XkbAllocCompatMap [1] |
| XCopyPlane [1] | XPolygonRegion [1] | XkbAllocControls [1] |
| XCreateBitmapFromData [1] | XProcessInternalConnection [1] | XkbAllocGeomColors [1] |
| XCreateColormap [1] | XProtocolRevision [1] | XkbAllocGeomDoodads [1] |
| XCreateFontCursor [1] | XProtocolVersion [1] | XkbAllocGeomKeyAliases [1] |
| XCreateFontSet [1] | XPutBackEvent [1] | XkbAllocGeomKeys [1] |
| XCreateGC [1] | XPutImage [1] | XkbAllocGeomOutlines [1] |
| XCreateGlyphCursor [1] | XPutPixel [1] | XkbAllocGeomOverlayKeys [1] |
| XCreateIC [1] | XQLength [1] | XkbAllocGeomOverlayRows [1] |
| XCreateImage [1] | XQueryBestCursor [1] | XkbAllocGeomOverlays [1] |
| XCreateOC [1] | XQueryBestSize [1] | XkbAllocGeomPoints [1] |
| XCreatePixmap [1] | XQueryBestStipple [1] | XkbAllocGeomProps [1] |
| XCreatePixmapCursor [1] | XQueryBestTile [1] | XkbAllocGeomRows [1] |
| XCreatePixmapFromBitmapData [1] | XQueryColor [1] | XkbAllocGeomSectionDoodads [1] |
| XCreateRegion [1] | XQueryColors [1] | XkbAllocGeomSections [1] |
| XCreateSimpleWindow [1] | XQueryExtension [1] | XkbAllocGeomShapes [1] |
| XCreateWindow [1] | XQueryFont [1] | XkbAllocGeometry [1] |
| XDefaultColormap [1] | XQueryKeymap [1] | XkbAllocIndicatorMaps [1] |
| XDefaultColormapOfScreen [1] | XQueryPointer [1] | XkbAllocKeyboard [1] |
| XDefaultDepth [1] | XQueryTextExtents [1] | XkbAllocNames [1] |
| XDefaultDepthOfScreen [1] | XQueryTextExtents16 [1] | XkbAllocServerMap [1] |
| XDefaultGC [1] | XQueryTree [1] | XkbApplyCompatMapToKey [1] |
| XDefaultGCOfScreen [1] | XRaiseWindow [1] | XkbBell [1] |
| XDefaultRootWindow [1] | XReadBitmapFile [1] | XkbBellEvent [1] |
| XDefaultScreen [1] | XReadBitmapFileData [1] | XkbChangeEnabledControls [1] |
| XDefaultScreenOfDisplay [1] | XRebindKeysym [1] | XkbChangeMap [1] |
| XDefaultString [1] | XRecolorCursor [1] | XkbChangeNames [1] |
| XDefaultVisual [1] | XReconfigureWMWindow [1] | XkbChangeTypesOfKey [1] |
| XDefaultVisualOfScreen [1] | XRectInRegion [1] | XkbComputeEffectiveMap [1] |
| XDefineCursor [1] | XRefreshKeyboardMapping [1] | XkbComputeRowBounds [1] |
| XDeleteContext [1] | XRegisterIMInstantiateCallback [1] | XkbComputeSectionBounds [1] |
| XDeleteModifiermapEntry [1] | XRemoveConnectionWatch [1] | XkbComputeShapeBounds [1] |
| XDeleteProperty [1] | XRemoveFromSaveSet [1] | XkbComputeShapeTop [1] |
| XDestroyIC [1] | XRemoveHost [1] | XkbCopyKeyType [1] |
| XDestroyImage [1] | XRemoveHosts [1] | XkbCopyKeyTypes [1] |
| XDestroyOC [1] | XReparentWindow [1] | XkbFindOverlayForKey [1] |
| XDestroyRegion [1] | XResetScreenSaver [1] | XkbForceBell [1] |
| XDestroySubwindows [1] | XResizeWindow [1] | XkbFreeClientMap [1] |
| XDestroyWindow [1] | XResourceManagerString [1] | XkbFreeCompatMap [1] |
| XDirectionalDependentDrawing [1] | XRestackWindows [1] | XkbFreeComponentList [1] |
| XDisableAccessControl [1] | XRootWindow [1] | XkbFreeControls [1] |
| XDisplayCells [1] | XRootWindowOfScreen [1] | XkbFreeGeomColors [1] |
| XDisplayHeight [1] | XRotateBuffers [1] | XkbFreeGeomDoodads [1] |
| XDisplayHeightMM [1] | XRotateWindowProperties [1] | XkbFreeGeomKeyAliases [1] |
| XDisplayKeycodes [1] | XSaveContext [1] | XkbFreeGeomKeys [1] |
| XDisplayMotionBufferSize [1] | XScreenCount [1] | XkbFreeGeomOutlines [1] |
| XDisplayName [1] | XScreenNumberOfScreen [1] | XkbFreeGeomOverlayKeys [1] |
| XDisplayOfIM [1] | XScreenOfDisplay [1] | XkbFreeGeomOverlayRows [1] |
| XDisplayOfOM [1] | XScreenResourceString [1] | XkbFreeGeomOverlays [1] |
| XDisplayOfScreen [1] | XSelectInput [1] | XkbFreeGeomPoints [1] |
| XDisplayPlanes [1] | XSendEvent [1] | XkbFreeGeomProperties [1] |
| XDisplayString [1] | XServerVendor [1] | XkbFreeGeomRows [1] |
| XDisplayWidth [1] | XSetAccessControl [1] | XkbFreeGeomSections [1] |
| XDisplayWidthMM [1] | XSetAfterFunction [1] | XkbFreeGeomShapes [1] |
| XDoesBackingStore [1] | XSetArcMode [1] | XkbFreeGeometry [1] |
| XDoesSaveUnders [1] | XSetAuthorization [1] | XkbFreeIndicatorMaps [1] |
| XDrawArc [1] | XSetBackground [1] | XkbFreeKeyboard [1] |
| XDrawArcs [1] | XSetClassHint [1] | XkbFreeNames [1] |
| XDrawImageString [1] | XSetClipMask [1] | XkbFreeServerMap [1] |
| XDrawImageString16 [1] | XSetClipOrigin [1] | XkbGetAutoRepeatRate [1] |
| XDrawLine [1] | XSetClipRectangles [1] | XkbGetCompatMap [1] |
| XDrawLines [1] | XSetCloseDownMode [1] | XkbGetControls [1] |
| XDrawPoint [1] | XSetCommand [1] | XkbGetGeometry [1] |
| XDrawPoints [1] | XSetDashes [1] | XkbGetIndicatorMap [1] |
| XDrawRectangle [1] | XSetErrorHandler [1] | XkbGetIndicatorState [1] |
| XDrawRectangles [1] | XSetFillRule [1] | XkbGetKeyActions [1] |
| XDrawSegments [1] | XSetFillStyle [1] | XkbGetKeyBehaviors [1] |
| XDrawString [1] | XSetFont [1] | XkbGetKeyExplicitComponents [1] |
| XDrawString16 [1] | XSetFontPath [1] | XkbGetKeyModifierMap [1] |
| XDrawText [1] | XSetForeground [1] | XkbGetKeySyms [1] |
| XDrawText16 [1] | XSetFunction [1] | XkbGetKeyTypes [1] |
| XEHeadOfExtensionList [1] | XSetGraphicsExposures [1] | XkbGetKeyboard [1] |
| XESetBeforeFlush [1] | XSetICFocus [1] | XkbGetKeyboardByName [1] |
| XESetCloseDisplay [1] | XSetICValues [1] | XkbGetMap [1] |
| XESetCopyGC [1] | XSetIMValues [1] | XkbGetMapChanges [1] |
| XESetCreateFont [1] | XSetIOErrorHandler [1] | XkbGetNamedGeometry [1] |
| XESetCreateGC [1] | XSetIconName [1] | XkbGetNamedIndicator [1] |
| XESetError [1] | XSetIconSizes [1] | XkbGetNames [1] |
| XESetErrorString [1] | XSetInputFocus [1] | XkbGetState [1] |
| XESetEventToWire [1] | XSetLineAttributes [1] | XkbGetUpdatedMap [1] |
| XESetFlushGC [1] | XSetLocaleModifiers [1] | XkbGetVirtualMods [1] |
| XESetFreeFont [1] | XSetModifierMapping [1] | XkbGetXlibControls [1] |
| XESetFreeGC [1] | XSetNormalHints [1] | XkbIgnoreExtension [1] |
| XESetPrintErrorValues [1] | XSetOCValues [1] | XkbInitCanonicalKeyTypes [1] |
| XESetWireToError [1] | XSetOMValues [1] | XkbKeyTypesForCoreSymbols [1] |
| XESetWireToEvent [1] | XSetPlaneMask [1] | XkbKeycodeToKeysym [1] |
| XEmptyRegion [1] | XSetPointerMapping [1] | XkbKeysymToModifiers [1] |
| XEnableAccessControl [1] | XSetRGBColormaps [1] | XkbLatchGroup [1] |
| XEqualRegion [1] | XSetRegion [1] | XkbLatchModifiers [1] |
| XEventMaskOfScreen [1] | XSetScreenSaver [1] | XkbLibraryVersion [1] |
| XEventsQueued [1] | XSetSelectionOwner [1] | XkbListComponents [1] |
| XExtendedMaxRequestSize [1] | XSetSizeHints [1] | XkbLockGroup [1] |
| XExtentsOfFontSet [1] | XSetStandardColormap [1] | XkbLockModifiers [1] |
| XFetchBuffer [1] | XSetStandardProperties [1] | XkbLookupKeyBinding [1] |
| XFetchBytes [1] | XSetState [1] | XkbLookupKeySym [1] |
| XFetchName [1] | XSetStipple [1] | XkbNoteControlsChanges [1] |
| XFillArc [1] | XSetSubwindowMode [1] | XkbNoteMapChanges [1] |
| XFillArcs [1] | XSetTSOrigin [1] | XkbNoteNameChanges [1] |
| XFillPolygon [1] | XSetTextProperty [1] | XkbOpenDisplay [1] |
| XFillRectangle [1] | XSetTile [1] | XkbQueryExtension [1] |
| XFillRectangles [1] | XSetTransientForHint [1] | XkbRefreshKeyboardMapping [1] |
| XFilterEvent [1] | XSetWMClientMachine [1] | XkbResizeKeyActions [1] |
| XFindContext [1] | XSetWMColormapWindows [1] | XkbResizeKeySyms [1] |
| XFindOnExtensionList [1] | XSetWMHints [1] | XkbResizeKeyType [1] |
| XFlush [1] | XSetWMIconName [1] | XkbSelectEventDetails [1] |
| XFlushGC [1] | XSetWMName [1] | XkbSelectEvents [1] |
| XFontsOfFontSet [1] | XSetWMNormalHints [1] | XkbSetAtomFuncs [1] |
| XForceScreenSaver [1] | XSetWMProperties [1] | XkbSetAutoRepeatRate [1] |
| XFree [1] | XSetWMProtocols [1] | XkbSetAutoResetControls [1] |
| XFreeColormap [1] | XSetWMSizeHints [1] | XkbSetCompatMap [1] |
| XFreeColors [1] | XSetWindowBackground [1] | XkbSetControls [1] |
| XFreeCursor [1] | XSetWindowBackgroundPixmap [1] | XkbSetDebuggingFlags [1] |
| XFreeExtensionList [1] | XSetWindowBorder [1] | XkbSetDetectableAutoRepeat [1] |
| XFreeFont [1] | XSetWindowBorderPixmap [1] | XkbSetGeometry [1] |
| XFreeFontInfo [1] | XSetWindowBorderWidth [1] | XkbSetIgnoreLockMods [1] |
| XFreeFontNames [1] | XSetWindowColormap [1] | XkbSetIndicatorMap [1] |
| XFreeFontPath [1] | XSetZoomHints [1] | XkbSetMap [1] |
| XFreeFontSet [1] | XShrinkRegion [1] | XkbSetNamedIndicator [1] |
| XFreeGC [1] | XStoreBuffer [1] | XkbSetNames [1] |
| XFreeModifiermap [1] | XStoreBytes [1] | XkbSetServerInternalMods [1] |
| XFreePixmap [1] | XStoreColor [1] | XkbSetXlibControls [1] |
| XFreeStringList [1] | XStoreColors [1] | XkbToControl [1] |
| XGContextFromGC [1] | XStoreName [1] | XkbTranslateKeyCode [1] |
| XGeometry [1] | XStoreNamedColor [1] | XkbTranslateKeySym [1] |
| XGetAtomName [1] | XStringListToTextProperty [1] | XkbUpdateMapFromCore [1] |
| XGetAtomNames [1] | XStringToKeysym [1] | XkbUseExtension [1] |
| XGetClassHint [1] | XSubImage [1] | XkbVirtualModsToReal [1] |
| XGetCommand [1] | XSubtractRegion [1] | XmbDrawImageString [1] |
| XGetDefault [1] | XSupportsLocale [1] | XmbDrawString [1] |
| XGetErrorDatabaseText [1] | XSync [1] | XmbDrawText [1] |
| XGetErrorText [1] | XSynchronize [1] | XmbLookupString [1] |
| XGetFontPath [1] | XTextExtents [1] | XmbResetIC [1] |
| XGetFontProperty [1] | XTextExtents16 [1] | XmbSetWMProperties [1] |
| XGetGCValues [1] | XTextPropertyToStringList [1] | XmbTextEscapement [1] |
| XGetGeometry [1] | XTextWidth [1] | XmbTextExtents [1] |
| XGetICValues [1] | XTextWidth16 [1] | XmbTextListToTextProperty [1] |
| XGetIMValues [1] | XTranslateCoordinates [1] | XmbTextPerCharExtents [1] |
| XGetIconName [1] | XUndefineCursor [1] | XmbTextPropertyToTextList [1] |
| XGetIconSizes [1] | XUngrabButton [1] | XrmCombineDatabase [1] |
| XGetImage [1] | XUngrabKey [1] | XrmCombineFileDatabase [1] |
| XGetInputFocus [1] | XUngrabKeyboard [1] | XrmDestroyDatabase [1] |
| XGetKeyboardControl [1] | XUngrabPointer [1] | XrmEnumerateDatabase [1] |
| XGetKeyboardMapping [1] | XUngrabServer [1] | XrmGetDatabase [1] |
| XGetModifierMapping [1] | XUninstallColormap [1] | XrmGetFileDatabase [1] |
| XGetMotionEvents [1] | XUnionRectWithRegion [1] | XrmGetResource [1] |
| XGetNormalHints [1] | XUnionRegion [1] | XrmGetStringDatabase [1] |
| XGetOCValues [1] | XUnloadFont [1] | XrmInitialize [1] |
| XGetOMValues [1] | XUnlockDisplay [1] | XrmLocaleOfDatabase [1] |
| XGetPixel [1] |