DdeQueryStringA

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

DWORD DdeQueryStringA(
    DWORD idInst,
    HSZ hsz,
    LPSTR psz,   // optional
    DWORD cchMax,
    INT iCodePage
);

<DllImport("USER32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function DdeQueryStringA(
    idInst As UInteger,   ' DWORD
    hsz As IntPtr,   ' HSZ
    <MarshalAs(UnmanagedType.LPStr)> psz As System.Text.StringBuilder,   ' LPSTR optional, out
    cchMax As UInteger,   ' DWORD
    iCodePage As Integer   ' INT
) As UInteger
End Function

' idInst : DWORD
' hsz : HSZ
' psz : LPSTR optional, out
' cchMax : DWORD
' iCodePage : INT
Declare PtrSafe Function DdeQueryStringA Lib "user32" ( _
    ByVal idInst As Long, _
    ByVal hsz As LongPtr, _
    ByVal psz As String, _
    ByVal cchMax As Long, _
    ByVal iCodePage As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

DdeQueryStringA = ctypes.windll.user32.DdeQueryStringA
DdeQueryStringA.restype = wintypes.DWORD
DdeQueryStringA.argtypes = [
    wintypes.DWORD,  # idInst : DWORD
    wintypes.HANDLE,  # hsz : HSZ
    wintypes.LPSTR,  # psz : LPSTR optional, out
    wintypes.DWORD,  # cchMax : DWORD
    ctypes.c_int,  # iCodePage : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
DdeQueryStringA = Fiddle::Function.new(
  lib['DdeQueryStringA'],
  [
    -Fiddle::TYPE_INT,  # idInst : DWORD
    Fiddle::TYPE_VOIDP,  # hsz : HSZ
    Fiddle::TYPE_VOIDP,  # psz : LPSTR optional, out
    -Fiddle::TYPE_INT,  # cchMax : DWORD
    Fiddle::TYPE_INT,  # iCodePage : INT
  ],
  -Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn DdeQueryStringA(
        idInst: u32,  // DWORD
        hsz: *mut core::ffi::c_void,  // HSZ
        psz: *mut u8,  // LPSTR optional, out
        cchMax: u32,  // DWORD
        iCodePage: i32  // INT
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", CharSet = CharSet.Ansi)]
public static extern uint DdeQueryStringA(uint idInst, IntPtr hsz, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder psz, uint cchMax, int iCodePage);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_DdeQueryStringA' -Namespace Win32 -PassThru
# $api::DdeQueryStringA(idInst, hsz, psz, cchMax, iCodePage)

#uselib "USER32.dll"
#func global DdeQueryStringA "DdeQueryStringA" sptr, sptr, sptr, sptr, sptr
; DdeQueryStringA idInst, hsz, varptr(psz), cchMax, iCodePage   ; 戻り値は stat
; idInst : DWORD -> "sptr"
; hsz : HSZ -> "sptr"
; psz : LPSTR optional, out -> "sptr"
; cchMax : DWORD -> "sptr"
; iCodePage : INT -> "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 DdeQueryStringA "DdeQueryStringA" int, sptr, var, int, int
; res = DdeQueryStringA(idInst, hsz, psz, cchMax, iCodePage)
; idInst : DWORD -> "int"
; hsz : HSZ -> "sptr"
; psz : LPSTR optional, out -> "var"
; cchMax : DWORD -> "int"
; iCodePage : INT -> "int"
; ※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。

; DWORD DdeQueryStringA(DWORD idInst, HSZ hsz, LPSTR psz, DWORD cchMax, INT iCodePage)
#uselib "USER32.dll"
#cfunc global DdeQueryStringA "DdeQueryStringA" int, intptr, var, int, int
; res = DdeQueryStringA(idInst, hsz, psz, cchMax, iCodePage)
; idInst : DWORD -> "int"
; hsz : HSZ -> "intptr"
; psz : LPSTR optional, out -> "var"
; cchMax : DWORD -> "int"
; iCodePage : INT -> "int"
; ※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 (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procDdeQueryStringA = user32.NewProc("DdeQueryStringA")
)

// idInst (DWORD), hsz (HSZ), psz (LPSTR optional, out), cchMax (DWORD), iCodePage (INT)
r1, _, err := procDdeQueryStringA.Call(
	uintptr(idInst),
	uintptr(hsz),
	uintptr(psz),
	uintptr(cchMax),
	uintptr(iCodePage),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DdeQueryStringA(
  idInst: DWORD;   // DWORD
  hsz: THandle;   // HSZ
  psz: PAnsiChar;   // LPSTR optional, out
  cchMax: DWORD;   // DWORD
  iCodePage: Integer   // INT
): DWORD; stdcall;
  external 'USER32.dll' name 'DdeQueryStringA';

result := DllCall("USER32\DdeQueryStringA"
    , "UInt", idInst   ; DWORD
    , "Ptr", hsz   ; HSZ
    , "Ptr", psz   ; LPSTR optional, out
    , "UInt", cchMax   ; DWORD
    , "Int", iCodePage   ; INT
    , "UInt")   ; return: DWORD

●DdeQueryStringA(idInst, hsz, psz, cchMax, iCodePage) = DLL("USER32.dll", "dword DdeQueryStringA(dword, void*, char*, dword, int)")
# 呼び出し: DdeQueryStringA(idInst, hsz, psz, cchMax, iCodePage)
# idInst : DWORD -> "dword"
# hsz : HSZ -> "void*"
# psz : LPSTR optional, out -> "char*"
# cchMax : DWORD -> "dword"
# iCodePage : INT -> "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)。