ns-richedit-bidioptions.md

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NS:richedit._bidioptions	BIDIOPTIONS (richedit.h)	Contains bidirectional information about a rich edit control. This structure is used by the EM_GETBIDIOPTIONS and EM_SETBIDIOPTIONS messages to get and set the bidirectional information for a control.	BIDIOPTIONS BIDIOPTIONS structure [Windows Controls] BOE_CONTEXTALIGNMENT BOE_CONTEXTREADING BOE_FORCERECALC BOE_LEGACYBIDICLASS BOE_NEUTRALOVERRIDE BOE_PLAINTEXT BOE_RTLDIR BOE_UNICODEBIDI BOM_CONTEXTALIGNMENT BOM_CONTEXTREADING BOM_DEFPARADIR BOM_LEGACYBIDICLASS BOM_NEUTRALOVERRIDE BOM_PLAINTEXT BOM_UNICODEBIDI _win32_BIDIOPTIONS_str _win32_BIDIOPTIONS_str_cpp controls.BIDIOPTIONS controls._win32_BIDIOPTIONS_str richedit/BIDIOPTIONS	controls\BIDIOPTIONS.htm	Controls	VS|Controls|~\controls\richedit\richeditcontrols\richeditcontrolreference\richeditstructures\bidioptions.htm	12/05/2018	BIDIOPTIONS, BIDIOPTIONS structure [Windows Controls], BOE_CONTEXTALIGNMENT, BOE_CONTEXTREADING, BOE_FORCERECALC, BOE_LEGACYBIDICLASS, BOE_NEUTRALOVERRIDE, BOE_PLAINTEXT, BOE_RTLDIR, BOE_UNICODEBIDI, BOM_CONTEXTALIGNMENT, BOM_CONTEXTREADING, BOM_DEFPARADIR, BOM_LEGACYBIDICLASS, BOM_NEUTRALOVERRIDE, BOM_PLAINTEXT, BOM_UNICODEBIDI, _win32_BIDIOPTIONS_str, _win32_BIDIOPTIONS_str_cpp, controls.BIDIOPTIONS, controls._win32_BIDIOPTIONS_str, richedit/BIDIOPTIONS	richedit.h		Windows	Windows Vista [desktop apps only]	Windows Server 2003 [desktop apps only]													Windows	BIDIOPTIONS	Rich Edit 3.0	19H1	_bidioptions richedit/_bidioptions BIDIOPTIONS richedit/BIDIOPTIONS	c++	APIRef kbSyntax	HeaderDef	Richedit.h	BIDIOPTIONS

BIDIOPTIONS structure

-description

Contains bidirectional information about a rich edit control. This structure is used by the EM_GETBIDIOPTIONS and EM_SETBIDIOPTIONS messages to get and set the bidirectional information for a control.

-struct-fields

-field cbSize

Type: UINT

Specifies the size, in bytes, of the structure. Before passing this structure to a rich edit control, set cbSize to the size of the BIDIOPTIONS structure. The rich edit control checks the size of cbSize before sending an EM_GETBIDIOPTIONS message.

-field wMask

Type: WORD

A set of mask bits that determine which of the wEffects flags will be set to 1 or 0 by the rich edit control. This approach eliminates the need to read the effects flags before changing them.

Obsolete bits are valid only for the bidirectional version of Rich Edit 1.0.

Value	Meaning
BOM_CONTEXTALIGNMENT	The BOE_CONTEXTALIGNMENT value is valid.
BOM_CONTEXTREADING	The BOE_CONTEXTREADING value is valid.
BOM_DEFPARADIR	The BOE_RTLDIR value is valid.
BOM_LEGACYBIDICLASS	The BOE_LEGACYBIDICLASS value is valid.
BOM_NEUTRALOVERRIDE	The BOE_NEUTRALOVERRIDE value is valid.
BOM_PLAINTEXT	The BOE_PLAINTEXT value is valid. (obsolete).
BOM_UNICODEBIDI	The BOE_UNICODEBIDI value is valid.

-field wEffects

Type: WORD

A set of flags that indicate the desired or current state of the effects flags. Obsolete bits are valid only for the bidirectional version of Rich Edit 1.0.

Obsolete bits are valid only for the bidirectional version of Rich Edit 1.0.

Value	Meaning
BOE_CONTEXTALIGNMENT	If this flag is 1, context paragraph alignment is active. This feature is used only for plain-text controls. When active, the paragraph alignment is set to PFA_LEFT if the first strongly directional character is LTR, or PFA_RIGHT if the first strongly directional character is RTL. If the control has no strongly directional character, the alignment is chosen according to the directionality of the keyboard language when the control regains focus (default: 0).
BOE_CONTEXTREADING	If this flag is 1, context paragraph directionality is active. This feature is used only for plain-text controls. When active, the paragraph directionality effect PFE_RTLPARA is set to 0 if the first strongly directional character is LTR, or 1 if the first strongly directional character is RTL. If the control has no strongly directional character, the directionality is chosen according to the directionality of the keyboard language when the control regains focus (default: 0).
BOE_FORCERECALC	Windows 8: Force the rich edit control to recalculate the bidirectional information, and then redraw the control.
BOE_LEGACYBIDICLASS	Causes the plus and minus characters to be treated as neutral characters with no implied direction. Also causes the slash character to be treated as a common separator.
BOE_NEUTRALOVERRIDE	If this flag is 1, the characters !"#&'()*+,-./:;<=> are treated as strong LTR characters (default: 0).
BOE_PLAINTEXT	Uses plain text layout (obsolete).
BOE_RTLDIR	Default paragraph direction—implies alignment (obsolete).
BOE_UNICODEBIDI	If this flag is 1, the Unicode Bidi Algorithm (UBA) is used for rich-text controls. The UBA is always used for plain-text controls (default: 0).

-see-also

EM_GETBIDIOPTIONS

EM_SETBIDIOPTIONS