GetMenuStringA

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

INT GetMenuStringA(
    HMENU hMenu,
    DWORD uIDItem,
    LPSTR lpString,   // optional
    INT cchMax,
    MENU_ITEM_FLAGS flags
);

<DllImport("USER32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function GetMenuStringA(
    hMenu As IntPtr,   ' HMENU
    uIDItem As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPStr)> lpString As System.Text.StringBuilder,   ' LPSTR optional, out
    cchMax As Integer,   ' INT
    flags As UInteger   ' MENU_ITEM_FLAGS
) As Integer
End Function

' hMenu : HMENU
' uIDItem : DWORD
' lpString : LPSTR optional, out
' cchMax : INT
' flags : MENU_ITEM_FLAGS
Declare PtrSafe Function GetMenuStringA Lib "user32" ( _
    ByVal hMenu As LongPtr, _
    ByVal uIDItem As Long, _
    ByVal lpString As String, _
    ByVal cchMax As Long, _
    ByVal flags 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

GetMenuStringA = ctypes.windll.user32.GetMenuStringA
GetMenuStringA.restype = ctypes.c_int
GetMenuStringA.argtypes = [
    wintypes.HANDLE,  # hMenu : HMENU
    wintypes.DWORD,  # uIDItem : DWORD
    wintypes.LPSTR,  # lpString : LPSTR optional, out
    ctypes.c_int,  # cchMax : INT
    wintypes.DWORD,  # flags : MENU_ITEM_FLAGS
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
GetMenuStringA = Fiddle::Function.new(
  lib['GetMenuStringA'],
  [
    Fiddle::TYPE_VOIDP,  # hMenu : HMENU
    -Fiddle::TYPE_INT,  # uIDItem : DWORD
    Fiddle::TYPE_VOIDP,  # lpString : LPSTR optional, out
    Fiddle::TYPE_INT,  # cchMax : INT
    -Fiddle::TYPE_INT,  # flags : MENU_ITEM_FLAGS
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn GetMenuStringA(
        hMenu: *mut core::ffi::c_void,  // HMENU
        uIDItem: u32,  // DWORD
        lpString: *mut u8,  // LPSTR optional, out
        cchMax: i32,  // INT
        flags: u32  // MENU_ITEM_FLAGS
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", CharSet = CharSet.Ansi)]
public static extern int GetMenuStringA(IntPtr hMenu, uint uIDItem, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder lpString, int cchMax, uint flags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_GetMenuStringA' -Namespace Win32 -PassThru
# $api::GetMenuStringA(hMenu, uIDItem, lpString, cchMax, flags)

#uselib "USER32.dll"
#func global GetMenuStringA "GetMenuStringA" sptr, sptr, sptr, sptr, sptr
; GetMenuStringA hMenu, uIDItem, varptr(lpString), cchMax, flags   ; 戻り値は stat
; hMenu : HMENU -> "sptr"
; uIDItem : DWORD -> "sptr"
; lpString : LPSTR optional, out -> "sptr"
; cchMax : INT -> "sptr"
; flags : MENU_ITEM_FLAGS -> "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 GetMenuStringA "GetMenuStringA" sptr, int, var, int, int
; res = GetMenuStringA(hMenu, uIDItem, lpString, cchMax, flags)
; hMenu : HMENU -> "sptr"
; uIDItem : DWORD -> "int"
; lpString : LPSTR optional, out -> "var"
; cchMax : INT -> "int"
; flags : MENU_ITEM_FLAGS -> "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。

; INT GetMenuStringA(HMENU hMenu, DWORD uIDItem, LPSTR lpString, INT cchMax, MENU_ITEM_FLAGS flags)
#uselib "USER32.dll"
#cfunc global GetMenuStringA "GetMenuStringA" intptr, int, var, int, int
; res = GetMenuStringA(hMenu, uIDItem, lpString, cchMax, flags)
; hMenu : HMENU -> "intptr"
; uIDItem : DWORD -> "int"
; lpString : LPSTR optional, out -> "var"
; cchMax : INT -> "int"
; flags : MENU_ITEM_FLAGS -> "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")
	procGetMenuStringA = user32.NewProc("GetMenuStringA")
)

// hMenu (HMENU), uIDItem (DWORD), lpString (LPSTR optional, out), cchMax (INT), flags (MENU_ITEM_FLAGS)
r1, _, err := procGetMenuStringA.Call(
	uintptr(hMenu),
	uintptr(uIDItem),
	uintptr(lpString),
	uintptr(cchMax),
	uintptr(flags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function GetMenuStringA(
  hMenu: THandle;   // HMENU
  uIDItem: DWORD;   // DWORD
  lpString: PAnsiChar;   // LPSTR optional, out
  cchMax: Integer;   // INT
  flags: DWORD   // MENU_ITEM_FLAGS
): Integer; stdcall;
  external 'USER32.dll' name 'GetMenuStringA';

result := DllCall("USER32\GetMenuStringA"
    , "Ptr", hMenu   ; HMENU
    , "UInt", uIDItem   ; DWORD
    , "Ptr", lpString   ; LPSTR optional, out
    , "Int", cchMax   ; INT
    , "UInt", flags   ; MENU_ITEM_FLAGS
    , "Int")   ; return: INT

●GetMenuStringA(hMenu, uIDItem, lpString, cchMax, flags) = DLL("USER32.dll", "int GetMenuStringA(void*, dword, char*, int, dword)")
# 呼び出し: GetMenuStringA(hMenu, uIDItem, lpString, cchMax, flags)
# hMenu : HMENU -> "void*"
# uIDItem : DWORD -> "dword"
# lpString : LPSTR optional, out -> "char*"
# cchMax : INT -> "int"
# flags : MENU_ITEM_FLAGS -> "dword"
# 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)。