IsCharSpaceW

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

BOOL IsCharSpaceW(
    WCHAR wch
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function IsCharSpaceW(
    wch As Char   ' WCHAR
) As Boolean
End Function

' wch : WCHAR
Declare PtrSafe Function IsCharSpaceW Lib "shlwapi" ( _
    ByVal wch 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

IsCharSpaceW = ctypes.windll.shlwapi.IsCharSpaceW
IsCharSpaceW.restype = wintypes.BOOL
IsCharSpaceW.argtypes = [
    ctypes.c_wchar,  # wch : WCHAR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
IsCharSpaceW = Fiddle::Function.new(
  lib['IsCharSpaceW'],
  [
    Fiddle::TYPE_SHORT,  # wch : WCHAR
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

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

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("SHLWAPI.dll", CharSet = CharSet.Unicode)]
public static extern bool IsCharSpaceW(char wch);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_IsCharSpaceW' -Namespace Win32 -PassThru
# $api::IsCharSpaceW(wch)

#uselib "SHLWAPI.dll"
#func global IsCharSpaceW "IsCharSpaceW" wptr
; IsCharSpaceW wch   ; 戻り値は stat
; wch : WCHAR -> "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 IsCharSpaceW "IsCharSpaceW" int
; res = IsCharSpaceW(wch)
; wch : WCHAR -> "int"

; BOOL IsCharSpaceW(WCHAR wch)
#uselib "SHLWAPI.dll"
#cfunc global IsCharSpaceW "IsCharSpaceW" int
; res = IsCharSpaceW(wch)
; wch : WCHAR -> "int"

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

var (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procIsCharSpaceW = shlwapi.NewProc("IsCharSpaceW")
)

// wch (WCHAR)
r1, _, err := procIsCharSpaceW.Call(
	uintptr(wch),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function IsCharSpaceW(
  wch: WideChar   // WCHAR
): BOOL; stdcall;
  external 'SHLWAPI.dll' name 'IsCharSpaceW';

result := DllCall("SHLWAPI\IsCharSpaceW"
    , "Short", wch   ; WCHAR
    , "Int")   ; return: BOOL

●IsCharSpaceW(wch) = DLL("SHLWAPI.dll", "bool IsCharSpaceW(int)")
# 呼び出し: IsCharSpaceW(wch)
# wch : WCHAR -> "int"
# 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。