OleGetClipboard

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

HRESULT OleGetClipboard(
    IDataObject** ppDataObj
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function OleGetClipboard(
    ppDataObj As IntPtr   ' IDataObject** out
) As Integer
End Function

' ppDataObj : IDataObject** out
Declare PtrSafe Function OleGetClipboard Lib "ole32" ( _
    ByVal ppDataObj 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

OleGetClipboard = ctypes.windll.ole32.OleGetClipboard
OleGetClipboard.restype = ctypes.c_int
OleGetClipboard.argtypes = [
    ctypes.c_void_p,  # ppDataObj : IDataObject** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
OleGetClipboard = Fiddle::Function.new(
  lib['OleGetClipboard'],
  [
    Fiddle::TYPE_VOIDP,  # ppDataObj : IDataObject** out
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("OLE32.dll")]
public static extern int OleGetClipboard(IntPtr ppDataObj);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_OleGetClipboard' -Namespace Win32 -PassThru
# $api::OleGetClipboard(ppDataObj)

#uselib "OLE32.dll"
#func global OleGetClipboard "OleGetClipboard" sptr
; OleGetClipboard ppDataObj   ; 戻り値は stat
; ppDataObj : IDataObject** 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 OleGetClipboard "OleGetClipboard" sptr
; res = OleGetClipboard(ppDataObj)
; ppDataObj : IDataObject** out -> "sptr"

; HRESULT OleGetClipboard(IDataObject** ppDataObj)
#uselib "OLE32.dll"
#cfunc global OleGetClipboard "OleGetClipboard" intptr
; res = OleGetClipboard(ppDataObj)
; ppDataObj : IDataObject** out -> "intptr"

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

var (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procOleGetClipboard = ole32.NewProc("OleGetClipboard")
)

// ppDataObj (IDataObject** out)
r1, _, err := procOleGetClipboard.Call(
	uintptr(ppDataObj),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function OleGetClipboard(
  ppDataObj: Pointer   // IDataObject** out
): Integer; stdcall;
  external 'OLE32.dll' name 'OleGetClipboard';

result := DllCall("OLE32\OleGetClipboard"
    , "Ptr", ppDataObj   ; IDataObject** out
    , "Int")   ; return: HRESULT

●OleGetClipboard(ppDataObj) = DLL("OLE32.dll", "int OleGetClipboard(void*)")
# 呼び出し: OleGetClipboard(ppDataObj)
# ppDataObj : IDataObject** 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)。