EditWordBreakProcEx

描述

The EditWordBreakProcEx function is an application defined–callback function used with the EM_SETWORDBREAKPROCEX message. It determines the character index of the word break or the character class and word-break flags of the characters in the specified text. The EDITWORDBREAKPROCEX type defines a pointer to this callback function. EditWordBreakProcEx is a placeholder for the application-defined function name.

C/C++ 语法

LONG EditWordBreakProcEx(

char *pchText,

LONG cchText,

BYTE bCharSet,

INT code

);

FreeBasic Declaration

FUNCTION EditWordBreakProcEx CDECL (

BYVAL pchText AS ZTRING PTR, _

BYVAL cchText AS LONG, _

BYVAL bCharSet AS UBYTE, _

BYVAL code AS INT_ _

) AS LONG

参数

pchText	[in] Pointer to the text at the current position. If code specifies movement to the left, the text is in the elements pchText [–1] through pchText [-cchText], and pchText[0] is undefined. For all other actions, the text is in the elements pchText[0] through pchText[ cchText–1].
cchText	[in] Number of characters in the buffer in the direction specified by code.
bCharset	[in] Character set of the text.
code	[in] The action to be taken by the callback function. This parameter can be one of the following values. WB_CLASSIFY Retrieves the character class and word break flags of the character at the specified position. This value is for use with rich edit controls. WB_ISDELIMITER Checks whether the character at the specified position is a delimiter. WB_LEFT Finds the beginning of a word to the left of the specified position. WB_LEFTBREAK Finds the end-of-word delimiter to the left of the specified position. This value is for use with rich edit controls. WB_MOVEWORDLEFT Finds the beginning of a word to the left of the specified position. This value is used during CTRL+LEFT key processing. This value is for use with rich edit controls. WB_MOVEWORDRIGHT Finds the beginning of a word to the right of the specified position. This value is used during CTRL+RIGHT key processing. This value is for use with rich edit controls. WB_RIGHT Finds the beginning of a word to the right of the specified position. This is useful in right-aligned edit controls. WB_RIGHTBREAK Finds the end-of-word delimiter to the right of the specified position. This is useful in right-aligned edit controls. This value is for use with rich edit controls.

Return Value

The function returns a value based on the code parameter.

code parameter	返回值
WB_CLASSIFY	Returns the character class and word-break flags of the character at the specified position.
WB_ISDELIMITER	Returns TRUE if the character at the specified position is a delimiter or FALSE if the character is not.
All other values	Returns the character index of the word break.

备注

An application must install the callback function by specifying the address of the callback function in an EM_SETWORDBREAKPROCEX message.

For Microsoft Rich Edit 2.0 and later, Rich Edit no longer supports EditWordBreakProcEx. Users can send EM_SETWORDBREAKPROC to set EditWordBreakProc, which is now enhanced to support the passing of Unicode text.

最低操作系统

Windows 95, Windows NT 4.0.