WriteFmtUserTypeStg

// OLE32.dll
#include <windows.h>

HRESULT WriteFmtUserTypeStg(
    IStorage* pstg,
    WORD cf,
    LPWSTR lpszUserType
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function WriteFmtUserTypeStg(
    pstg As IntPtr,   ' IStorage*
    cf As UShort,   ' WORD
    <MarshalAs(UnmanagedType.LPWStr)> lpszUserType As String   ' LPWSTR
) As Integer
End Function

' pstg : IStorage*
' cf : WORD
' lpszUserType : LPWSTR
Declare PtrSafe Function WriteFmtUserTypeStg Lib "ole32" ( _
    ByVal pstg As LongPtr, _
    ByVal cf As Integer, _
    ByVal lpszUserType As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

WriteFmtUserTypeStg = ctypes.windll.ole32.WriteFmtUserTypeStg
WriteFmtUserTypeStg.restype = ctypes.c_int
WriteFmtUserTypeStg.argtypes = [
    ctypes.c_void_p,  # pstg : IStorage*
    ctypes.c_ushort,  # cf : WORD
    wintypes.LPCWSTR,  # lpszUserType : LPWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
WriteFmtUserTypeStg = Fiddle::Function.new(
  lib['WriteFmtUserTypeStg'],
  [
    Fiddle::TYPE_VOIDP,  # pstg : IStorage*
    -Fiddle::TYPE_SHORT,  # cf : WORD
    Fiddle::TYPE_VOIDP,  # lpszUserType : LPWSTR
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn WriteFmtUserTypeStg(
        pstg: *mut core::ffi::c_void,  // IStorage*
        cf: u16,  // WORD
        lpszUserType: *mut u16  // LPWSTR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLE32.dll")]
public static extern int WriteFmtUserTypeStg(IntPtr pstg, ushort cf, [MarshalAs(UnmanagedType.LPWStr)] string lpszUserType);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_WriteFmtUserTypeStg' -Namespace Win32 -PassThru
# $api::WriteFmtUserTypeStg(pstg, cf, lpszUserType)

#uselib "OLE32.dll"
#func global WriteFmtUserTypeStg "WriteFmtUserTypeStg" sptr, sptr, sptr
; WriteFmtUserTypeStg pstg, cf, lpszUserType   ; 戻り値は stat
; pstg : IStorage* -> "sptr"
; cf : WORD -> "sptr"
; lpszUserType : LPWSTR -> "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 "OLE32.dll"
#cfunc global WriteFmtUserTypeStg "WriteFmtUserTypeStg" sptr, int, wstr
; res = WriteFmtUserTypeStg(pstg, cf, lpszUserType)
; pstg : IStorage* -> "sptr"
; cf : WORD -> "int"
; lpszUserType : LPWSTR -> "wstr"

; HRESULT WriteFmtUserTypeStg(IStorage* pstg, WORD cf, LPWSTR lpszUserType)
#uselib "OLE32.dll"
#cfunc global WriteFmtUserTypeStg "WriteFmtUserTypeStg" intptr, int, wstr
; res = WriteFmtUserTypeStg(pstg, cf, lpszUserType)
; pstg : IStorage* -> "intptr"
; cf : WORD -> "int"
; lpszUserType : LPWSTR -> "wstr"

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

var (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procWriteFmtUserTypeStg = ole32.NewProc("WriteFmtUserTypeStg")
)

// pstg (IStorage*), cf (WORD), lpszUserType (LPWSTR)
r1, _, err := procWriteFmtUserTypeStg.Call(
	uintptr(pstg),
	uintptr(cf),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszUserType))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function WriteFmtUserTypeStg(
  pstg: Pointer;   // IStorage*
  cf: Word;   // WORD
  lpszUserType: PWideChar   // LPWSTR
): Integer; stdcall;
  external 'OLE32.dll' name 'WriteFmtUserTypeStg';

result := DllCall("OLE32\WriteFmtUserTypeStg"
    , "Ptr", pstg   ; IStorage*
    , "UShort", cf   ; WORD
    , "WStr", lpszUserType   ; LPWSTR
    , "Int")   ; return: HRESULT

●WriteFmtUserTypeStg(pstg, cf, lpszUserType) = DLL("OLE32.dll", "int WriteFmtUserTypeStg(void*, int, char*)")
# 呼び出し: WriteFmtUserTypeStg(pstg, cf, lpszUserType)
# pstg : IStorage* -> "void*"
# cf : WORD -> "int"
# lpszUserType : LPWSTR -> "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)。