WTSOpenServerA

// WTSAPI32.dll  (ANSI / -A)
#include <windows.h>

HANDLE WTSOpenServerA(
    LPSTR pServerName
);

<DllImport("WTSAPI32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function WTSOpenServerA(
    <MarshalAs(UnmanagedType.LPStr)> pServerName As String   ' LPSTR
) As IntPtr
End Function

' pServerName : LPSTR
Declare PtrSafe Function WTSOpenServerA Lib "wtsapi32" ( _
    ByVal pServerName As String) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

WTSOpenServerA = ctypes.windll.wtsapi32.WTSOpenServerA
WTSOpenServerA.restype = ctypes.c_void_p
WTSOpenServerA.argtypes = [
    wintypes.LPCSTR,  # pServerName : LPSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WTSAPI32.dll')
WTSOpenServerA = Fiddle::Function.new(
  lib['WTSOpenServerA'],
  [
    Fiddle::TYPE_VOIDP,  # pServerName : LPSTR
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "wtsapi32")]
extern "system" {
    fn WTSOpenServerA(
        pServerName: *mut u8  // LPSTR
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WTSAPI32.dll", CharSet = CharSet.Ansi)]
public static extern IntPtr WTSOpenServerA([MarshalAs(UnmanagedType.LPStr)] string pServerName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WTSAPI32_WTSOpenServerA' -Namespace Win32 -PassThru
# $api::WTSOpenServerA(pServerName)

#uselib "WTSAPI32.dll"
#func global WTSOpenServerA "WTSOpenServerA" sptr
; WTSOpenServerA pServerName   ; 戻り値は stat
; pServerName : LPSTR -> "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 "WTSAPI32.dll"
#cfunc global WTSOpenServerA "WTSOpenServerA" str
; res = WTSOpenServerA(pServerName)
; pServerName : LPSTR -> "str"

; HANDLE WTSOpenServerA(LPSTR pServerName)
#uselib "WTSAPI32.dll"
#cfunc global WTSOpenServerA "WTSOpenServerA" str
; res = WTSOpenServerA(pServerName)
; pServerName : LPSTR -> "str"

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

var (
	wtsapi32 = windows.NewLazySystemDLL("WTSAPI32.dll")
	procWTSOpenServerA = wtsapi32.NewProc("WTSOpenServerA")
)

// pServerName (LPSTR)
r1, _, err := procWTSOpenServerA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pServerName))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HANDLE

function WTSOpenServerA(
  pServerName: PAnsiChar   // LPSTR
): THandle; stdcall;
  external 'WTSAPI32.dll' name 'WTSOpenServerA';

result := DllCall("WTSAPI32\WTSOpenServerA"
    , "AStr", pServerName   ; LPSTR
    , "Ptr")   ; return: HANDLE

●WTSOpenServerA(pServerName) = DLL("WTSAPI32.dll", "void* WTSOpenServerA(char*)")
# 呼び出し: WTSOpenServerA(pServerName)
# pServerName : LPSTR -> "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)。

const std = @import("std");

extern "wtsapi32" fn WTSOpenServerA(
    pServerName: [*c]const u8 // LPSTR
) callconv(std.os.windows.WINAPI) ?*anyopaque;

proc WTSOpenServerA(
    pServerName: cstring  # LPSTR
): pointer {.importc: "WTSOpenServerA", stdcall, dynlib: "WTSAPI32.dll".}

pragma(lib, "wtsapi32");
extern(Windows)
void* WTSOpenServerA(
    const(char)* pServerName   // LPSTR
);

ccall((:WTSOpenServerA, "WTSAPI32.dll"), stdcall, Ptr{Cvoid},
      (Cstring,),
      pServerName)
# pServerName : LPSTR -> Cstring
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void* WTSOpenServerA(
    const char* pServerName);
]]
local wtsapi32 = ffi.load("wtsapi32")
-- wtsapi32.WTSOpenServerA(pServerName)
-- pServerName : LPSTR
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('WTSAPI32.dll');
const WTSOpenServerA = lib.func('__stdcall', 'WTSOpenServerA', 'void *', ['str']);
// WTSOpenServerA(pServerName)
// pServerName : LPSTR -> 'str'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("WTSAPI32.dll", {
  WTSOpenServerA: { parameters: ["buffer"], result: "pointer" },
});
// lib.symbols.WTSOpenServerA(pServerName)
// pServerName : LPSTR -> "buffer"
// 文字列は "buffer"。ANSI(-A) は new TextEncoder() で UTF-8/ANSI バイト列(末尾に \x00)を渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
void* WTSOpenServerA(
    const char* pServerName);
C, "WTSAPI32.dll");
// $ffi->WTSOpenServerA(pServerName);
// pServerName : LPSTR
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Wtsapi32 extends StdCallLibrary {
    Wtsapi32 INSTANCE = Native.load("wtsapi32", Wtsapi32.class, W32APIOptions.ASCII_OPTIONS);
    Pointer WTSOpenServerA(
        String pServerName   // LPSTR
    );
}

@[Link("wtsapi32")]
lib LibWTSAPI32
  fun WTSOpenServerA = WTSOpenServerA(
    pServerName : UInt8*   # LPSTR
  ) : Void*
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef WTSOpenServerANative = Pointer<Void> Function(Pointer<Utf8>);
typedef WTSOpenServerADart = Pointer<Void> Function(Pointer<Utf8>);
final WTSOpenServerA = DynamicLibrary.open('WTSAPI32.dll')
    .lookupFunction<WTSOpenServerANative, WTSOpenServerADart>('WTSOpenServerA');
// pServerName : LPSTR -> Pointer<Utf8>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function WTSOpenServerA(
  pServerName: PAnsiChar   // LPSTR
): THandle; stdcall;
  external 'WTSAPI32.dll' name 'WTSOpenServerA';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "WTSOpenServerA"
  c_WTSOpenServerA :: CString -> IO (Ptr ())
-- pServerName : LPSTR -> CString
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let wtsopenservera =
  foreign "WTSOpenServerA"
    (string @-> returning (ptr void))
(* pServerName : LPSTR -> string *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library wtsapi32 (t "WTSAPI32.dll"))
(cffi:use-foreign-library wtsapi32)

(cffi:defcfun ("WTSOpenServerA" wtsopen-server-a :convention :stdcall) :pointer
  (p-server-name :string))   ; LPSTR
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $WTSOpenServerA = Win32::API::More->new('WTSAPI32',
    'HANDLE WTSOpenServerA(LPCSTR pServerName)');
# my $ret = $WTSOpenServerA->Call($pServerName);
# pServerName : LPSTR -> LPCSTR
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。