GetStringTypeW

// KERNEL32.dll  (Unicode / -W)
#include <windows.h>

BOOL GetStringTypeW(
    DWORD dwInfoType,
    LPCWSTR lpSrcStr,
    INT cchSrc,
    WORD* lpCharType
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetStringTypeW(
    dwInfoType As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> lpSrcStr As String,   ' LPCWSTR
    cchSrc As Integer,   ' INT
    <Out> ByRef lpCharType As UShort   ' WORD* out
) As Boolean
End Function

' dwInfoType : DWORD
' lpSrcStr : LPCWSTR
' cchSrc : INT
' lpCharType : WORD* out
Declare PtrSafe Function GetStringTypeW Lib "kernel32" ( _
    ByVal dwInfoType As Long, _
    ByVal lpSrcStr As LongPtr, _
    ByVal cchSrc As Long, _
    ByRef lpCharType As Integer) 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

GetStringTypeW = ctypes.windll.kernel32.GetStringTypeW
GetStringTypeW.restype = wintypes.BOOL
GetStringTypeW.argtypes = [
    wintypes.DWORD,  # dwInfoType : DWORD
    wintypes.LPCWSTR,  # lpSrcStr : LPCWSTR
    ctypes.c_int,  # cchSrc : INT
    ctypes.POINTER(ctypes.c_ushort),  # lpCharType : WORD* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetStringTypeW = Fiddle::Function.new(
  lib['GetStringTypeW'],
  [
    -Fiddle::TYPE_INT,  # dwInfoType : DWORD
    Fiddle::TYPE_VOIDP,  # lpSrcStr : LPCWSTR
    Fiddle::TYPE_INT,  # cchSrc : INT
    Fiddle::TYPE_VOIDP,  # lpCharType : WORD* out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "kernel32")]
extern "system" {
    fn GetStringTypeW(
        dwInfoType: u32,  // DWORD
        lpSrcStr: *const u16,  // LPCWSTR
        cchSrc: i32,  // INT
        lpCharType: *mut u16  // WORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool GetStringTypeW(uint dwInfoType, [MarshalAs(UnmanagedType.LPWStr)] string lpSrcStr, int cchSrc, out ushort lpCharType);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetStringTypeW' -Namespace Win32 -PassThru
# $api::GetStringTypeW(dwInfoType, lpSrcStr, cchSrc, lpCharType)

#uselib "KERNEL32.dll"
#func global GetStringTypeW "GetStringTypeW" wptr, wptr, wptr, wptr
; GetStringTypeW dwInfoType, lpSrcStr, cchSrc, varptr(lpCharType)   ; 戻り値は stat
; dwInfoType : DWORD -> "wptr"
; lpSrcStr : LPCWSTR -> "wptr"
; cchSrc : INT -> "wptr"
; lpCharType : WORD* out -> "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 "KERNEL32.dll"
#cfunc global GetStringTypeW "GetStringTypeW" int, wstr, int, var
; res = GetStringTypeW(dwInfoType, lpSrcStr, cchSrc, lpCharType)
; dwInfoType : DWORD -> "int"
; lpSrcStr : LPCWSTR -> "wstr"
; cchSrc : INT -> "int"
; lpCharType : WORD* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; BOOL GetStringTypeW(DWORD dwInfoType, LPCWSTR lpSrcStr, INT cchSrc, WORD* lpCharType)
#uselib "KERNEL32.dll"
#cfunc global GetStringTypeW "GetStringTypeW" int, wstr, int, var
; res = GetStringTypeW(dwInfoType, lpSrcStr, cchSrc, lpCharType)
; dwInfoType : DWORD -> "int"
; lpSrcStr : LPCWSTR -> "wstr"
; cchSrc : INT -> "int"
; lpCharType : WORD* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procGetStringTypeW = kernel32.NewProc("GetStringTypeW")
)

// dwInfoType (DWORD), lpSrcStr (LPCWSTR), cchSrc (INT), lpCharType (WORD* out)
r1, _, err := procGetStringTypeW.Call(
	uintptr(dwInfoType),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpSrcStr))),
	uintptr(cchSrc),
	uintptr(lpCharType),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetStringTypeW(
  dwInfoType: DWORD;   // DWORD
  lpSrcStr: PWideChar;   // LPCWSTR
  cchSrc: Integer;   // INT
  lpCharType: Pointer   // WORD* out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'GetStringTypeW';

result := DllCall("KERNEL32\GetStringTypeW"
    , "UInt", dwInfoType   ; DWORD
    , "WStr", lpSrcStr   ; LPCWSTR
    , "Int", cchSrc   ; INT
    , "Ptr", lpCharType   ; WORD* out
    , "Int")   ; return: BOOL

●GetStringTypeW(dwInfoType, lpSrcStr, cchSrc, lpCharType) = DLL("KERNEL32.dll", "bool GetStringTypeW(dword, char*, int, void*)")
# 呼び出し: GetStringTypeW(dwInfoType, lpSrcStr, cchSrc, lpCharType)
# dwInfoType : DWORD -> "dword"
# lpSrcStr : LPCWSTR -> "char*"
# cchSrc : INT -> "int"
# lpCharType : WORD* out -> "void*"
# 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。