IsCharLowerA

// USER32.dll  (ANSI / -A)
#include <windows.h>

BOOL IsCharLowerA(
    CHAR ch
);

<DllImport("USER32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function IsCharLowerA(
    ch As SByte   ' CHAR
) As Boolean
End Function

' ch : CHAR
Declare PtrSafe Function IsCharLowerA Lib "user32" ( _
    ByVal ch 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

IsCharLowerA = ctypes.windll.user32.IsCharLowerA
IsCharLowerA.restype = wintypes.BOOL
IsCharLowerA.argtypes = [
    ctypes.c_byte,  # ch : CHAR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
IsCharLowerA = Fiddle::Function.new(
  lib['IsCharLowerA'],
  [
    Fiddle::TYPE_CHAR,  # ch : CHAR
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn IsCharLowerA(
        ch: i8  // CHAR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern bool IsCharLowerA(sbyte ch);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_IsCharLowerA' -Namespace Win32 -PassThru
# $api::IsCharLowerA(ch)

#uselib "USER32.dll"
#func global IsCharLowerA "IsCharLowerA" sptr
; IsCharLowerA ch   ; 戻り値は stat
; ch : 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 "USER32.dll"
#cfunc global IsCharLowerA "IsCharLowerA" int
; res = IsCharLowerA(ch)
; ch : CHAR -> "int"

; BOOL IsCharLowerA(CHAR ch)
#uselib "USER32.dll"
#cfunc global IsCharLowerA "IsCharLowerA" int
; res = IsCharLowerA(ch)
; ch : CHAR -> "int"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procIsCharLowerA = user32.NewProc("IsCharLowerA")
)

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

function IsCharLowerA(
  ch: Shortint   // CHAR
): BOOL; stdcall;
  external 'USER32.dll' name 'IsCharLowerA';

result := DllCall("USER32\IsCharLowerA"
    , "Char", ch   ; CHAR
    , "Int")   ; return: BOOL

●IsCharLowerA(ch) = DLL("USER32.dll", "bool IsCharLowerA(char)")
# 呼び出し: IsCharLowerA(ch)
# ch : 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)。