The RichTextBox control recognizes the following RTF (Rich Text Format) codes. All other RTF codes are ignored by the control when loading text.
| RTF Code | Description | RTF Code | Description |
| - | OptionalHyphen | objcropl | CropLeft |
| \n | EndParagraph | objcropr | CropRight |
| \r | EndParagraph | objcropt | CropTop |
| _ | NonBreakingHyphen | objdata | ObjectData |
| | | FormulaCharacter | object | Object |
| ~ | NonBreakingSpace | objemb | ObjectEmbedded |
| ansi | CharSetAnsi | objh | Height |
| b | Bold | objicemb | ObjectMacICEmbedder |
| bin | BinaryData | objlink | ObjectLink |
| blue | ColorBlue | objname | ObjectName |
| bullet | ANSI Character 149 | objpub | ObjectMacPublisher |
| cb | ColorBackground | objscalex | ScaleX |
| cell | Cell | objscaley | ScaleY |
| cf | ColorForeground | objsetsize | ObjectSetSize |
| colortbl | ColorTable | objsub | ObjectMacSubscriber |
| cpg | CodePage | objw | Width |
| deff | DefaultFont | par | EndParagraph |
| deflang | DefaultLanguage | pard | ParagraphDefault |
| deftab | DefaultTabWidth | pc | CharSetPc |
| deleted | Deleted | pca | CharSetPs2 |
| dibitmap | PictureWindowsDIB | piccropb | CropBottom |
| dn | Down | piccropl | CropLeft |
| dy | TimeDay | piccropr | CropRight |
| emdash | ANSI Character 151 | piccropt | CropTop |
| endash | ANSI Character 150 | pich | Height |
| f | FontSelect | pichgoal | DesiredHeight |
| fbidi | FontFamilyBidi | picscalex | ScaleX |
| fchars | FollowingPunct | picscaley | ScaleY |
| fcharset | CharSet | pict | Picture |
| fdecor | FontFamilyDecorative | picw | Width |
| fi | IndentFirst | picwgoal | DesiredWidth |
| field | Field | plain | CharacterDefault |
| fldinst | FieldInstruction | pmmetafile | PictureOS2Metafile |
| fldrslt | FieldResult | pn | ParaNum |
| fmodern | FontFamilyModern | pnindent | ParaNumIndent |
| fname | RealFontName | pnlvlblt | ParaNumBullet |
| fnil | FontFamilyDefault | pntext | ParaNumText |
| fontemb | FontEmbedded | pntxta | ParaNumAfter |
| fontfile | FontFile | pntxtb | ParaNumBefore |
| fonttbl | FontTable | protect | Protect |
| footer | NullDestination (Footer) | qc | AlignCenter |
| footerf | NullDestination (Footer, first) | ql | AlignLeft |
| footerl | NullDestination (Footer, left) | qr | AlignRight |
| footerr | NullDestination (Footer, right) | rdblquote | ANSI Character 34 |
| footnote | NullDestination (footnote) | red | ColorRed |
| fprq | Pitch | result | ObjectResult |
| froman | FontFamilyRoman | revauth | RevAuthor |
| fs | FontSize | revised | Revision |
| fscript | FontFamilyScript | ri | IndentRight |
| fswiss | FontFamilySwiss | row | Row |
| ftech | FontFamilyTechnical | rquote | ANSI Character 39 |
| ftncn | NullDestination (Footnote cont.) | rtf | Rtf |
| ftnsep | NullDestination (Footnote separ) | rtlch | RightToLeftChars |
| ftnsepc | NullDestination (Footnote cont. separ) | rtldoc | RightToLeftDocument |
| green | ColorGreen | rtlmark | DisplayRightToLeft |
| header | NullDestination (Header) | rtlpar | RightToLeftParagraph |
| headerf | NullDestination (Header, first) | sec | TimeSecond |
| headerl | NullDestination (Header, left) | sect | EndSection |
| headerr | NullDestination (Header, right) | sectd | SectionDefault |
| horzdoc | HorizontalRender | strike | StrikeOut |
| hr | TimeHour | stylesheet | StyleSheet |
| I | Italic | sub | Subscript |
| info | DocumentArea (Info fields) | super | Superscript |
| intbl | InTable | tb | TabPosition |
| lang | Language | tc | NullDestination (Table of contents) |
| lchars | LeadingPunct | tx | TabPosition |
| ldblquote | ANSI Character 34 | ul | Underline |
| li | IndentLeft | uld | UnderlineDotted |
| line | SoftBreak | uldash | UnderlineDash |
| lquote | ANSI Character 39 | uldashd | UnderlineDashDotted |
| ltrch | LeftToRightChars | uldashdd | UnderlineDashDotDotted |
| ltrdoc | LeftToRightDocument | uldb | UnderlineDouble |
| ltrmark | DisplayLeftToRight | ulhair | UnderlineHairline |
| ltrpar | LeftToRightParagraph | ulnone | StopUnderline |
| mac | CharSetMacintosh | ulth | UnderlineThick |
| macpict | PictureQuickDraw | ulw | UnderlineWord |
| margl | MarginLeft | ulwave | UnderlineWave |
| marglsxn | SectionMarginLeft | up | Up |
| margr | MarginRight | v | HiddenText |
| margrsxn | SectionMarginRight | vertdoc | VerticalRender |
| min | TimeMinute | wbitmap | PictureWindowsBitmap |
| mo | TimeMonth | wbmbitspixel | BitmapBitsPerPixel |
| nocwrap | NoWordBreak | wbmplanes | BitmapNumPlanes |
| nooverflow | NoOverflow | wbmwidthbytes | BitmapWidthBytes |
| nosupersub | NoSuperSub | wmetafile | PictureWindowsMetafile |
| nowwrap | NoWordWrap | xe | NullDestination (index entry) |
| objautlink | ObjectAutoLink | yr | TimeYear |
| objclass | ObjectClass | zwj | ZeroWidthJoiner |
| objcropb | CropBottom | zwnj | ZeroWidthNonJoiner |