ProgIDFromCLSID

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

HRESULT ProgIDFromCLSID(
    const GUID* clsid,
    LPWSTR* lplpszProgID
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function ProgIDFromCLSID(
    ByRef clsid As Guid,   ' GUID*
    lplpszProgID As IntPtr   ' LPWSTR* out
) As Integer
End Function

' clsid : GUID*
' lplpszProgID : LPWSTR* out
Declare PtrSafe Function ProgIDFromCLSID Lib "ole32" ( _
    ByVal clsid As LongPtr, _
    ByVal lplpszProgID 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

ProgIDFromCLSID = ctypes.windll.ole32.ProgIDFromCLSID
ProgIDFromCLSID.restype = ctypes.c_int
ProgIDFromCLSID.argtypes = [
    ctypes.c_void_p,  # clsid : GUID*
    ctypes.c_void_p,  # lplpszProgID : LPWSTR* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
ProgIDFromCLSID = Fiddle::Function.new(
  lib['ProgIDFromCLSID'],
  [
    Fiddle::TYPE_VOIDP,  # clsid : GUID*
    Fiddle::TYPE_VOIDP,  # lplpszProgID : LPWSTR* out
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("OLE32.dll")]
public static extern int ProgIDFromCLSID(ref Guid clsid, IntPtr lplpszProgID);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_ProgIDFromCLSID' -Namespace Win32 -PassThru
# $api::ProgIDFromCLSID(clsid, lplpszProgID)

#uselib "OLE32.dll"
#func global ProgIDFromCLSID "ProgIDFromCLSID" sptr, sptr
; ProgIDFromCLSID varptr(clsid), varptr(lplpszProgID)   ; 戻り値は stat
; clsid : GUID* -> "sptr"
; lplpszProgID : LPWSTR* 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 ProgIDFromCLSID "ProgIDFromCLSID" var, var
; res = ProgIDFromCLSID(clsid, lplpszProgID)
; clsid : GUID* -> "var"
; lplpszProgID : LPWSTR* 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 ProgIDFromCLSID(GUID* clsid, LPWSTR* lplpszProgID)
#uselib "OLE32.dll"
#cfunc global ProgIDFromCLSID "ProgIDFromCLSID" var, var
; res = ProgIDFromCLSID(clsid, lplpszProgID)
; clsid : GUID* -> "var"
; lplpszProgID : LPWSTR* 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")
	procProgIDFromCLSID = ole32.NewProc("ProgIDFromCLSID")
)

// clsid (GUID*), lplpszProgID (LPWSTR* out)
r1, _, err := procProgIDFromCLSID.Call(
	uintptr(clsid),
	uintptr(lplpszProgID),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function ProgIDFromCLSID(
  clsid: PGUID;   // GUID*
  lplpszProgID: PPWideChar   // LPWSTR* out
): Integer; stdcall;
  external 'OLE32.dll' name 'ProgIDFromCLSID';

result := DllCall("OLE32\ProgIDFromCLSID"
    , "Ptr", clsid   ; GUID*
    , "Ptr", lplpszProgID   ; LPWSTR* out
    , "Int")   ; return: HRESULT

●ProgIDFromCLSID(clsid, lplpszProgID) = DLL("OLE32.dll", "int ProgIDFromCLSID(void*, void*)")
# 呼び出し: ProgIDFromCLSID(clsid, lplpszProgID)
# clsid : GUID* -> "void*"
# lplpszProgID : LPWSTR* 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)。