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VarCmp.3w
Langue: en
Version: Jun 2009 (debian - 07/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
VarCmp (OLEAUT32.176)SYNOPSIS
HRESULT VarCmp(
LPVARIANT left,
LPVARIANT right,
LCID lcid,
DWORD flags
)
DESCRIPTION
Compare two variants.
PARAMS
left [In] First variant.right [In] Second variant.
lcid [In] LCID (locale identifier) for the comparison.
flags [In] Flags to be used in the comparison: NORM_IGNORECASE, NORM_IGNORENONSPACE, NORM_IGNORESYMBOLS, NORM_IGNOREWIDTH, NORM_IGNOREKANATYPE, NORM_IGNOREKASHIDA.
RETURNS
VARCMP_LT: left variant is less than right variant. VARCMP_EQ: input variants are equal. VARCMP_GT: left variant is greater than right variant. VARCMP_NULL: either one of the input variants is NULL.
Failure: An HRESULT error code indicating the error.
NOTES
Native VarCmp up to and including WinXP doesn't like I1, UI2, VT_UI4, UI8 and UINT as input variants. INT is accepted only as left variant.
If both input variants are ERROR then VARCMP_EQ will be returned, else an ERROR variant will trigger an error.
Both input variants can have VT_RESERVED flag set which is ignored unless one and only one of the variants is a BSTR and the other one is not an EMPTY variant. All four VT_RESERVED combinations have a different meaning:
- BSTR and other: BSTR is always greater than the other variant.
- BSTR|VT_RESERVED and other: a string comparison is performed.
- BSTR and other|VT_RESERVED: If the BSTR is a number a numeric comparison will take place else the BSTR is always greater.
- BSTR|VT_RESERVED and other|VT_RESERVED: It seems that the other variant is ignored and the return value depends only on the sign of the BSTR if it is a number else the BSTR is always greater. A positive BSTR is greater, a negative one is smaller than the other variant.
SEE
VarBstrCmp for the lcid and flags usage.
IMPLEMENTATION
Defined in "oleauto.h".
Implemented in "dlls/oleaut32/variant.c".
Debug channel "variant".
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre