ImmSetCompositionString

[Now Supported on Windows NT]

The ImmSetCompositionString function sets the characters, attributes, and clauses of the composition and reading strings.

BOOL ImmSetCompositionString(

HIMC hIMC,
DWORD dwIndex,
LPCVOID lpComp,
DWORD dwCompLen,
LPCVOID lpRead,
DWORD dwReadLen
);

Parameters

hIMC

Handle to the input context.

dwIndex

Type of information to set. This parameter can be one of one of the following values:

Value	Meaning
SCS_SETSTR	Sets the composition string, the reading string, or both. At least one of the lpComp and lpRead parameters must point to a valid string. If either string is too long, the IME truncates it.
SCS_CHANGEATTR	Sets attributes for the composition string, the reading string, or both. At least one of the lpComp and lpRead parameters must point to a valid attribute array.
SCS_CHANGECLAUSE	Sets the clause information for the composition string, the reading string, or both. At least one of the lpComp and lpRead parameters must point to a valid clause information array.

lpComp

Pointer to the buffer containing the information to set for the composition string. The information is as specified by the dwIndex value.

dwCompLen

Size in bytes of the information buffer for the composition string.

lpRead

Pointer to the buffer containing the information to set for the reading string. The information is as specified by the dwIndex value.

dwReadLen

Size, in bytes, of the information buffer for the reading string.

Return Values

If the function succeeds, the return value is a nonzero value.

If the function fails, the return value is zero.

Remarks

When changing attributes, all characters in a clause must have the same attribute. Converted characters must be either ATTR_CONVERTED or ATTR_TARGET_CONVERTED; unconverted characters either ATTR_INPUT or ATTR_TARGET_NOTCONVERTED.

When changing clause information, only the target clause can be changed and only one boundary of the clause can be changed at a time. The target clause has the ATTR_TARGET_CONVERTED or ATTR_TARGET_NOTCONVERTED attribute.

When the IME completes the changes, it sends a WM_IME_COMPOSITION message to the application notifying it of the changes.

See Also

WM_IME_COMPOSITION

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