StrCmpLogicalW function (shlwapi.h)

Compares two Unicode strings. Digits in the strings are considered as numerical content rather than text. This test is not case-sensitive.

int StrCmpLogicalW(
  [in] PCWSTR psz1,
  [in] PCWSTR psz2
);

[in] psz1

Type: PCWSTR

A pointer to the first null-terminated string to be compared.

[in] psz2

Type: PCWSTR

A pointer to the second null-terminated string to be compared.

Type: int

• Returns zero if the strings are identical.
• Returns 1 if the string pointed to by psz1 has a greater value than that pointed to by psz2.
• Returns -1 if the string pointed to by psz1 has a lesser value than that pointed to by psz2.

This function's ordering schema differs somewhat from StrCmpI, which also compares strings without regard to case sensitivity. Considering digits by their numerical value—as StrCmpLogicalW does—strings are ordered as follows:

2string
3string
20string
st2ring
st3ring
st20ring
string2
string3
string20

StrCmpI considers digits in the string only as text so that those same strings are ordered as follows:

20string
2string
3string
st20ring
st2ring
st3ring
string2
string20
string3