CoSwitchCallContext

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

HRESULT CoSwitchCallContext(
    IUnknown* pNewObject,   // optional
    IUnknown** ppOldObject
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function CoSwitchCallContext(
    pNewObject As IntPtr,   ' IUnknown* optional
    ppOldObject As IntPtr   ' IUnknown** out
) As Integer
End Function

' pNewObject : IUnknown* optional
' ppOldObject : IUnknown** out
Declare PtrSafe Function CoSwitchCallContext Lib "ole32" ( _
    ByVal pNewObject As LongPtr, _
    ByVal ppOldObject 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

CoSwitchCallContext = ctypes.windll.ole32.CoSwitchCallContext
CoSwitchCallContext.restype = ctypes.c_int
CoSwitchCallContext.argtypes = [
    ctypes.c_void_p,  # pNewObject : IUnknown* optional
    ctypes.c_void_p,  # ppOldObject : IUnknown** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
CoSwitchCallContext = Fiddle::Function.new(
  lib['CoSwitchCallContext'],
  [
    Fiddle::TYPE_VOIDP,  # pNewObject : IUnknown* optional
    Fiddle::TYPE_VOIDP,  # ppOldObject : IUnknown** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn CoSwitchCallContext(
        pNewObject: *mut core::ffi::c_void,  // IUnknown* optional
        ppOldObject: *mut *mut core::ffi::c_void  // IUnknown** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLE32.dll")]
public static extern int CoSwitchCallContext(IntPtr pNewObject, IntPtr ppOldObject);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_CoSwitchCallContext' -Namespace Win32 -PassThru
# $api::CoSwitchCallContext(pNewObject, ppOldObject)

#uselib "OLE32.dll"
#func global CoSwitchCallContext "CoSwitchCallContext" sptr, sptr
; CoSwitchCallContext pNewObject, ppOldObject   ; 戻り値は stat
; pNewObject : IUnknown* optional -> "sptr"
; ppOldObject : IUnknown** 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 CoSwitchCallContext "CoSwitchCallContext" sptr, sptr
; res = CoSwitchCallContext(pNewObject, ppOldObject)
; pNewObject : IUnknown* optional -> "sptr"
; ppOldObject : IUnknown** out -> "sptr"

; HRESULT CoSwitchCallContext(IUnknown* pNewObject, IUnknown** ppOldObject)
#uselib "OLE32.dll"
#cfunc global CoSwitchCallContext "CoSwitchCallContext" intptr, intptr
; res = CoSwitchCallContext(pNewObject, ppOldObject)
; pNewObject : IUnknown* optional -> "intptr"
; ppOldObject : IUnknown** out -> "intptr"

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

var (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procCoSwitchCallContext = ole32.NewProc("CoSwitchCallContext")
)

// pNewObject (IUnknown* optional), ppOldObject (IUnknown** out)
r1, _, err := procCoSwitchCallContext.Call(
	uintptr(pNewObject),
	uintptr(ppOldObject),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function CoSwitchCallContext(
  pNewObject: Pointer;   // IUnknown* optional
  ppOldObject: Pointer   // IUnknown** out
): Integer; stdcall;
  external 'OLE32.dll' name 'CoSwitchCallContext';

result := DllCall("OLE32\CoSwitchCallContext"
    , "Ptr", pNewObject   ; IUnknown* optional
    , "Ptr", ppOldObject   ; IUnknown** out
    , "Int")   ; return: HRESULT

●CoSwitchCallContext(pNewObject, ppOldObject) = DLL("OLE32.dll", "int CoSwitchCallContext(void*, void*)")
# 呼び出し: CoSwitchCallContext(pNewObject, ppOldObject)
# pNewObject : IUnknown* optional -> "void*"
# ppOldObject : IUnknown** 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)。