WICMapGuidToShortName

// WindowsCodecs.dll
#include <windows.h>

HRESULT WICMapGuidToShortName(
    const GUID* guid,
    DWORD cchName,
    LPWSTR wzName,   // optional
    DWORD* pcchActual
);

<DllImport("WindowsCodecs.dll", ExactSpelling:=True)>
Public Shared Function WICMapGuidToShortName(
    ByRef guid As Guid,   ' GUID*
    cchName As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> wzName As System.Text.StringBuilder,   ' LPWSTR optional, in/out
    <Out> ByRef pcchActual As UInteger   ' DWORD* out
) As Integer
End Function

' guid : GUID*
' cchName : DWORD
' wzName : LPWSTR optional, in/out
' pcchActual : DWORD* out
Declare PtrSafe Function WICMapGuidToShortName Lib "windowscodecs" ( _
    ByVal guid As LongPtr, _
    ByVal cchName As Long, _
    ByVal wzName As LongPtr, _
    ByRef pcchActual 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

WICMapGuidToShortName = ctypes.windll.windowscodecs.WICMapGuidToShortName
WICMapGuidToShortName.restype = ctypes.c_int
WICMapGuidToShortName.argtypes = [
    ctypes.c_void_p,  # guid : GUID*
    wintypes.DWORD,  # cchName : DWORD
    wintypes.LPWSTR,  # wzName : LPWSTR optional, in/out
    ctypes.POINTER(wintypes.DWORD),  # pcchActual : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WindowsCodecs.dll')
WICMapGuidToShortName = Fiddle::Function.new(
  lib['WICMapGuidToShortName'],
  [
    Fiddle::TYPE_VOIDP,  # guid : GUID*
    -Fiddle::TYPE_INT,  # cchName : DWORD
    Fiddle::TYPE_VOIDP,  # wzName : LPWSTR optional, in/out
    Fiddle::TYPE_VOIDP,  # pcchActual : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "windowscodecs")]
extern "system" {
    fn WICMapGuidToShortName(
        guid: *const GUID,  // GUID*
        cchName: u32,  // DWORD
        wzName: *mut u16,  // LPWSTR optional, in/out
        pcchActual: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WindowsCodecs.dll")]
public static extern int WICMapGuidToShortName(ref Guid guid, uint cchName, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder wzName, out uint pcchActual);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WindowsCodecs_WICMapGuidToShortName' -Namespace Win32 -PassThru
# $api::WICMapGuidToShortName(guid, cchName, wzName, pcchActual)

#uselib "WindowsCodecs.dll"
#func global WICMapGuidToShortName "WICMapGuidToShortName" sptr, sptr, sptr, sptr
; WICMapGuidToShortName varptr(guid), cchName, varptr(wzName), varptr(pcchActual)   ; 戻り値は stat
; guid : GUID* -> "sptr"
; cchName : DWORD -> "sptr"
; wzName : LPWSTR optional, in/out -> "sptr"
; pcchActual : DWORD* out -> "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 "WindowsCodecs.dll"
#cfunc global WICMapGuidToShortName "WICMapGuidToShortName" var, int, var, var
; res = WICMapGuidToShortName(guid, cchName, wzName, pcchActual)
; guid : GUID* -> "var"
; cchName : DWORD -> "int"
; wzName : LPWSTR optional, in/out -> "var"
; pcchActual : DWORD* out -> "var"
; ※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。

; HRESULT WICMapGuidToShortName(GUID* guid, DWORD cchName, LPWSTR wzName, DWORD* pcchActual)
#uselib "WindowsCodecs.dll"
#cfunc global WICMapGuidToShortName "WICMapGuidToShortName" var, int, var, var
; res = WICMapGuidToShortName(guid, cchName, wzName, pcchActual)
; guid : GUID* -> "var"
; cchName : DWORD -> "int"
; wzName : LPWSTR optional, in/out -> "var"
; pcchActual : DWORD* out -> "var"
; ※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 (
	windowscodecs = windows.NewLazySystemDLL("WindowsCodecs.dll")
	procWICMapGuidToShortName = windowscodecs.NewProc("WICMapGuidToShortName")
)

// guid (GUID*), cchName (DWORD), wzName (LPWSTR optional, in/out), pcchActual (DWORD* out)
r1, _, err := procWICMapGuidToShortName.Call(
	uintptr(guid),
	uintptr(cchName),
	uintptr(wzName),
	uintptr(pcchActual),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function WICMapGuidToShortName(
  guid: PGUID;   // GUID*
  cchName: DWORD;   // DWORD
  wzName: PWideChar;   // LPWSTR optional, in/out
  pcchActual: Pointer   // DWORD* out
): Integer; stdcall;
  external 'WindowsCodecs.dll' name 'WICMapGuidToShortName';

result := DllCall("WindowsCodecs\WICMapGuidToShortName"
    , "Ptr", guid   ; GUID*
    , "UInt", cchName   ; DWORD
    , "Ptr", wzName   ; LPWSTR optional, in/out
    , "Ptr", pcchActual   ; DWORD* out
    , "Int")   ; return: HRESULT

●WICMapGuidToShortName(guid, cchName, wzName, pcchActual) = DLL("WindowsCodecs.dll", "int WICMapGuidToShortName(void*, dword, char*, void*)")
# 呼び出し: WICMapGuidToShortName(guid, cchName, wzName, pcchActual)
# guid : GUID* -> "void*"
# cchName : DWORD -> "dword"
# wzName : LPWSTR optional, in/out -> "char*"
# pcchActual : DWORD* out -> "void*"
# 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)。