AMGetErrorTextA

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

DWORD AMGetErrorTextA(
    HRESULT hr,
    LPSTR pbuffer,
    DWORD MaxLen
);

<DllImport("QUARTZ.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function AMGetErrorTextA(
    hr As Integer,   ' HRESULT
    <MarshalAs(UnmanagedType.LPStr)> pbuffer As System.Text.StringBuilder,   ' LPSTR out
    MaxLen As UInteger   ' DWORD
) As UInteger
End Function

' hr : HRESULT
' pbuffer : LPSTR out
' MaxLen : DWORD
Declare PtrSafe Function AMGetErrorTextA Lib "quartz" ( _
    ByVal hr As Long, _
    ByVal pbuffer As String, _
    ByVal MaxLen 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

AMGetErrorTextA = ctypes.windll.quartz.AMGetErrorTextA
AMGetErrorTextA.restype = wintypes.DWORD
AMGetErrorTextA.argtypes = [
    ctypes.c_int,  # hr : HRESULT
    wintypes.LPSTR,  # pbuffer : LPSTR out
    wintypes.DWORD,  # MaxLen : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('QUARTZ.dll')
AMGetErrorTextA = Fiddle::Function.new(
  lib['AMGetErrorTextA'],
  [
    Fiddle::TYPE_INT,  # hr : HRESULT
    Fiddle::TYPE_VOIDP,  # pbuffer : LPSTR out
    -Fiddle::TYPE_INT,  # MaxLen : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "quartz")]
extern "system" {
    fn AMGetErrorTextA(
        hr: i32,  // HRESULT
        pbuffer: *mut u8,  // LPSTR out
        MaxLen: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("QUARTZ.dll", CharSet = CharSet.Ansi)]
public static extern uint AMGetErrorTextA(int hr, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder pbuffer, uint MaxLen);
"@
$api = Add-Type -MemberDefinition $sig -Name 'QUARTZ_AMGetErrorTextA' -Namespace Win32 -PassThru
# $api::AMGetErrorTextA(hr, pbuffer, MaxLen)

#uselib "QUARTZ.dll"
#func global AMGetErrorTextA "AMGetErrorTextA" sptr, sptr, sptr
; AMGetErrorTextA hr, varptr(pbuffer), MaxLen   ; 戻り値は stat
; hr : HRESULT -> "sptr"
; pbuffer : LPSTR out -> "sptr"
; MaxLen : DWORD -> "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 "QUARTZ.dll"
#cfunc global AMGetErrorTextA "AMGetErrorTextA" int, var, int
; res = AMGetErrorTextA(hr, pbuffer, MaxLen)
; hr : HRESULT -> "int"
; pbuffer : LPSTR out -> "var"
; MaxLen : DWORD -> "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 AMGetErrorTextA(HRESULT hr, LPSTR pbuffer, DWORD MaxLen)
#uselib "QUARTZ.dll"
#cfunc global AMGetErrorTextA "AMGetErrorTextA" int, var, int
; res = AMGetErrorTextA(hr, pbuffer, MaxLen)
; hr : HRESULT -> "int"
; pbuffer : LPSTR out -> "var"
; MaxLen : DWORD -> "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 (
	quartz = windows.NewLazySystemDLL("QUARTZ.dll")
	procAMGetErrorTextA = quartz.NewProc("AMGetErrorTextA")
)

// hr (HRESULT), pbuffer (LPSTR out), MaxLen (DWORD)
r1, _, err := procAMGetErrorTextA.Call(
	uintptr(hr),
	uintptr(pbuffer),
	uintptr(MaxLen),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function AMGetErrorTextA(
  hr: Integer;   // HRESULT
  pbuffer: PAnsiChar;   // LPSTR out
  MaxLen: DWORD   // DWORD
): DWORD; stdcall;
  external 'QUARTZ.dll' name 'AMGetErrorTextA';

result := DllCall("QUARTZ\AMGetErrorTextA"
    , "Int", hr   ; HRESULT
    , "Ptr", pbuffer   ; LPSTR out
    , "UInt", MaxLen   ; DWORD
    , "UInt")   ; return: DWORD

●AMGetErrorTextA(hr, pbuffer, MaxLen) = DLL("QUARTZ.dll", "dword AMGetErrorTextA(int, char*, dword)")
# 呼び出し: AMGetErrorTextA(hr, pbuffer, MaxLen)
# hr : HRESULT -> "int"
# pbuffer : LPSTR out -> "char*"
# MaxLen : DWORD -> "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)。