IsCharSpaceA

// SHLWAPI.dll  (ANSI / -A)
#include <windows.h>

BOOL IsCharSpaceA(
    CHAR wch
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function IsCharSpaceA(
    wch As SByte   ' CHAR
) As Boolean
End Function

' wch : CHAR
Declare PtrSafe Function IsCharSpaceA Lib "shlwapi" ( _
    ByVal wch As Byte) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

IsCharSpaceA = ctypes.windll.shlwapi.IsCharSpaceA
IsCharSpaceA.restype = wintypes.BOOL
IsCharSpaceA.argtypes = [
    ctypes.c_byte,  # wch : CHAR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
IsCharSpaceA = Fiddle::Function.new(
  lib['IsCharSpaceA'],
  [
    Fiddle::TYPE_CHAR,  # wch : CHAR
  ],
  Fiddle::TYPE_INT)

#[link(name = "shlwapi")]
extern "system" {
    fn IsCharSpaceA(
        wch: i8  // CHAR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

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

#uselib "SHLWAPI.dll"
#func global IsCharSpaceA "IsCharSpaceA" sptr
; IsCharSpaceA wch   ; 戻り値は stat
; wch : CHAR -> "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 "SHLWAPI.dll"
#cfunc global IsCharSpaceA "IsCharSpaceA" int
; res = IsCharSpaceA(wch)
; wch : CHAR -> "int"

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

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

var (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procIsCharSpaceA = shlwapi.NewProc("IsCharSpaceA")
)

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

function IsCharSpaceA(
  wch: Shortint   // CHAR
): BOOL; stdcall;
  external 'SHLWAPI.dll' name 'IsCharSpaceA';

result := DllCall("SHLWAPI\IsCharSpaceA"
    , "Char", wch   ; CHAR
    , "Int")   ; return: BOOL

●IsCharSpaceA(wch) = DLL("SHLWAPI.dll", "bool IsCharSpaceA(char)")
# 呼び出し: IsCharSpaceA(wch)
# wch : CHAR -> "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)。