PropStgNameToFmtId

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

HRESULT PropStgNameToFmtId(
    LPCWSTR oszName,
    GUID* pfmtid
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function PropStgNameToFmtId(
    <MarshalAs(UnmanagedType.LPWStr)> oszName As String,   ' LPCWSTR
    <Out> ByRef pfmtid As Guid   ' GUID* out
) As Integer
End Function

' oszName : LPCWSTR
' pfmtid : GUID* out
Declare PtrSafe Function PropStgNameToFmtId Lib "ole32" ( _
    ByVal oszName As LongPtr, _
    ByVal pfmtid 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

PropStgNameToFmtId = ctypes.windll.ole32.PropStgNameToFmtId
PropStgNameToFmtId.restype = ctypes.c_int
PropStgNameToFmtId.argtypes = [
    wintypes.LPCWSTR,  # oszName : LPCWSTR
    ctypes.c_void_p,  # pfmtid : GUID* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
PropStgNameToFmtId = Fiddle::Function.new(
  lib['PropStgNameToFmtId'],
  [
    Fiddle::TYPE_VOIDP,  # oszName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pfmtid : GUID* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn PropStgNameToFmtId(
        oszName: *const u16,  // LPCWSTR
        pfmtid: *mut GUID  // GUID* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLE32.dll")]
public static extern int PropStgNameToFmtId([MarshalAs(UnmanagedType.LPWStr)] string oszName, out Guid pfmtid);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_PropStgNameToFmtId' -Namespace Win32 -PassThru
# $api::PropStgNameToFmtId(oszName, pfmtid)

#uselib "OLE32.dll"
#func global PropStgNameToFmtId "PropStgNameToFmtId" sptr, sptr
; PropStgNameToFmtId oszName, varptr(pfmtid)   ; 戻り値は stat
; oszName : LPCWSTR -> "sptr"
; pfmtid : GUID* 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 "OLE32.dll"
#cfunc global PropStgNameToFmtId "PropStgNameToFmtId" wstr, var
; res = PropStgNameToFmtId(oszName, pfmtid)
; oszName : LPCWSTR -> "wstr"
; pfmtid : GUID* 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 PropStgNameToFmtId(LPCWSTR oszName, GUID* pfmtid)
#uselib "OLE32.dll"
#cfunc global PropStgNameToFmtId "PropStgNameToFmtId" wstr, var
; res = PropStgNameToFmtId(oszName, pfmtid)
; oszName : LPCWSTR -> "wstr"
; pfmtid : GUID* 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 (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procPropStgNameToFmtId = ole32.NewProc("PropStgNameToFmtId")
)

// oszName (LPCWSTR), pfmtid (GUID* out)
r1, _, err := procPropStgNameToFmtId.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(oszName))),
	uintptr(pfmtid),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function PropStgNameToFmtId(
  oszName: PWideChar;   // LPCWSTR
  pfmtid: PGUID   // GUID* out
): Integer; stdcall;
  external 'OLE32.dll' name 'PropStgNameToFmtId';

result := DllCall("OLE32\PropStgNameToFmtId"
    , "WStr", oszName   ; LPCWSTR
    , "Ptr", pfmtid   ; GUID* out
    , "Int")   ; return: HRESULT

●PropStgNameToFmtId(oszName, pfmtid) = DLL("OLE32.dll", "int PropStgNameToFmtId(char*, void*)")
# 呼び出し: PropStgNameToFmtId(oszName, pfmtid)
# oszName : LPCWSTR -> "char*"
# pfmtid : GUID* 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)。