StrToIntW

// SHLWAPI.dll  (Unicode / -W)
#include <windows.h>

INT StrToIntW(
    LPCWSTR pszSrc
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function StrToIntW(
    <MarshalAs(UnmanagedType.LPWStr)> pszSrc As String   ' LPCWSTR
) As Integer
End Function

' pszSrc : LPCWSTR
Declare PtrSafe Function StrToIntW Lib "shlwapi" ( _
    ByVal pszSrc As LongPtr) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

StrToIntW = ctypes.windll.shlwapi.StrToIntW
StrToIntW.restype = ctypes.c_int
StrToIntW.argtypes = [
    wintypes.LPCWSTR,  # pszSrc : LPCWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
StrToIntW = Fiddle::Function.new(
  lib['StrToIntW'],
  [
    Fiddle::TYPE_VOIDP,  # pszSrc : LPCWSTR
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "shlwapi")]
extern "system" {
    fn StrToIntW(
        pszSrc: *const u16  // LPCWSTR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll", CharSet = CharSet.Unicode)]
public static extern int StrToIntW([MarshalAs(UnmanagedType.LPWStr)] string pszSrc);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_StrToIntW' -Namespace Win32 -PassThru
# $api::StrToIntW(pszSrc)

#uselib "SHLWAPI.dll"
#func global StrToIntW "StrToIntW" wptr
; StrToIntW pszSrc   ; 戻り値は stat
; pszSrc : LPCWSTR -> "wptr"
; ※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 "SHLWAPI.dll"
#cfunc global StrToIntW "StrToIntW" wstr
; res = StrToIntW(pszSrc)
; pszSrc : LPCWSTR -> "wstr"

; INT StrToIntW(LPCWSTR pszSrc)
#uselib "SHLWAPI.dll"
#cfunc global StrToIntW "StrToIntW" wstr
; res = StrToIntW(pszSrc)
; pszSrc : LPCWSTR -> "wstr"

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

var (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procStrToIntW = shlwapi.NewProc("StrToIntW")
)

// pszSrc (LPCWSTR)
r1, _, err := procStrToIntW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszSrc))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function StrToIntW(
  pszSrc: PWideChar   // LPCWSTR
): Integer; stdcall;
  external 'SHLWAPI.dll' name 'StrToIntW';

result := DllCall("SHLWAPI\StrToIntW"
    , "WStr", pszSrc   ; LPCWSTR
    , "Int")   ; return: INT

●StrToIntW(pszSrc) = DLL("SHLWAPI.dll", "int StrToIntW(char*)")
# 呼び出し: StrToIntW(pszSrc)
# pszSrc : LPCWSTR -> "char*"
# 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。