VarBstrCmp

// OLEAUT32.dll
#include <windows.h>

HRESULT VarBstrCmp(
    LPWSTR bstrLeft,
    LPWSTR bstrRight,
    DWORD lcid,
    DWORD dwFlags
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarBstrCmp(
    <MarshalAs(UnmanagedType.LPWStr)> bstrLeft As String,   ' LPWSTR
    <MarshalAs(UnmanagedType.LPWStr)> bstrRight As String,   ' LPWSTR
    lcid As UInteger,   ' DWORD
    dwFlags As UInteger   ' DWORD
) As Integer
End Function

' bstrLeft : LPWSTR
' bstrRight : LPWSTR
' lcid : DWORD
' dwFlags : DWORD
Declare PtrSafe Function VarBstrCmp Lib "oleaut32" ( _
    ByVal bstrLeft As LongPtr, _
    ByVal bstrRight As LongPtr, _
    ByVal lcid As Long, _
    ByVal dwFlags As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

VarBstrCmp = ctypes.windll.oleaut32.VarBstrCmp
VarBstrCmp.restype = ctypes.c_int
VarBstrCmp.argtypes = [
    wintypes.LPCWSTR,  # bstrLeft : LPWSTR
    wintypes.LPCWSTR,  # bstrRight : LPWSTR
    wintypes.DWORD,  # lcid : DWORD
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarBstrCmp = Fiddle::Function.new(
  lib['VarBstrCmp'],
  [
    Fiddle::TYPE_VOIDP,  # bstrLeft : LPWSTR
    Fiddle::TYPE_VOIDP,  # bstrRight : LPWSTR
    -Fiddle::TYPE_INT,  # lcid : DWORD
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarBstrCmp(
        bstrLeft: *mut u16,  // LPWSTR
        bstrRight: *mut u16,  // LPWSTR
        lcid: u32,  // DWORD
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarBstrCmp([MarshalAs(UnmanagedType.LPWStr)] string bstrLeft, [MarshalAs(UnmanagedType.LPWStr)] string bstrRight, uint lcid, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarBstrCmp' -Namespace Win32 -PassThru
# $api::VarBstrCmp(bstrLeft, bstrRight, lcid, dwFlags)

#uselib "OLEAUT32.dll"
#func global VarBstrCmp "VarBstrCmp" sptr, sptr, sptr, sptr
; VarBstrCmp bstrLeft, bstrRight, lcid, dwFlags   ; 戻り値は stat
; bstrLeft : LPWSTR -> "sptr"
; bstrRight : LPWSTR -> "sptr"
; lcid : DWORD -> "sptr"
; dwFlags : DWORD -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "OLEAUT32.dll"
#cfunc global VarBstrCmp "VarBstrCmp" wstr, wstr, int, int
; res = VarBstrCmp(bstrLeft, bstrRight, lcid, dwFlags)
; bstrLeft : LPWSTR -> "wstr"
; bstrRight : LPWSTR -> "wstr"
; lcid : DWORD -> "int"
; dwFlags : DWORD -> "int"

; HRESULT VarBstrCmp(LPWSTR bstrLeft, LPWSTR bstrRight, DWORD lcid, DWORD dwFlags)
#uselib "OLEAUT32.dll"
#cfunc global VarBstrCmp "VarBstrCmp" wstr, wstr, int, int
; res = VarBstrCmp(bstrLeft, bstrRight, lcid, dwFlags)
; bstrLeft : LPWSTR -> "wstr"
; bstrRight : LPWSTR -> "wstr"
; lcid : DWORD -> "int"
; dwFlags : DWORD -> "int"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procVarBstrCmp = oleaut32.NewProc("VarBstrCmp")
)

// bstrLeft (LPWSTR), bstrRight (LPWSTR), lcid (DWORD), dwFlags (DWORD)
r1, _, err := procVarBstrCmp.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(bstrLeft))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(bstrRight))),
	uintptr(lcid),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function VarBstrCmp(
  bstrLeft: PWideChar;   // LPWSTR
  bstrRight: PWideChar;   // LPWSTR
  lcid: DWORD;   // DWORD
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarBstrCmp';

result := DllCall("OLEAUT32\VarBstrCmp"
    , "WStr", bstrLeft   ; LPWSTR
    , "WStr", bstrRight   ; LPWSTR
    , "UInt", lcid   ; DWORD
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: HRESULT

●VarBstrCmp(bstrLeft, bstrRight, lcid, dwFlags) = DLL("OLEAUT32.dll", "int VarBstrCmp(char*, char*, dword, dword)")
# 呼び出し: VarBstrCmp(bstrLeft, bstrRight, lcid, dwFlags)
# bstrLeft : LPWSTR -> "char*"
# bstrRight : LPWSTR -> "char*"
# lcid : DWORD -> "dword"
# dwFlags : DWORD -> "dword"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。