DdeAddData

// USER32.dll
#include <windows.h>

HDDEDATA DdeAddData(
    HDDEDATA hData,
    BYTE* pSrc,
    DWORD cb,
    DWORD cbOff
);

<DllImport("USER32.dll", ExactSpelling:=True)>
Public Shared Function DdeAddData(
    hData As IntPtr,   ' HDDEDATA
    pSrc As IntPtr,   ' BYTE*
    cb As UInteger,   ' DWORD
    cbOff As UInteger   ' DWORD
) As IntPtr
End Function

' hData : HDDEDATA
' pSrc : BYTE*
' cb : DWORD
' cbOff : DWORD
Declare PtrSafe Function DdeAddData Lib "user32" ( _
    ByVal hData As LongPtr, _
    ByVal pSrc As LongPtr, _
    ByVal cb As Long, _
    ByVal cbOff As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

DdeAddData = ctypes.windll.user32.DdeAddData
DdeAddData.restype = ctypes.c_void_p
DdeAddData.argtypes = [
    wintypes.HANDLE,  # hData : HDDEDATA
    ctypes.POINTER(ctypes.c_ubyte),  # pSrc : BYTE*
    wintypes.DWORD,  # cb : DWORD
    wintypes.DWORD,  # cbOff : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
DdeAddData = Fiddle::Function.new(
  lib['DdeAddData'],
  [
    Fiddle::TYPE_VOIDP,  # hData : HDDEDATA
    Fiddle::TYPE_VOIDP,  # pSrc : BYTE*
    -Fiddle::TYPE_INT,  # cb : DWORD
    -Fiddle::TYPE_INT,  # cbOff : DWORD
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "user32")]
extern "system" {
    fn DdeAddData(
        hData: *mut core::ffi::c_void,  // HDDEDATA
        pSrc: *mut u8,  // BYTE*
        cb: u32,  // DWORD
        cbOff: u32  // DWORD
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll")]
public static extern IntPtr DdeAddData(IntPtr hData, IntPtr pSrc, uint cb, uint cbOff);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_DdeAddData' -Namespace Win32 -PassThru
# $api::DdeAddData(hData, pSrc, cb, cbOff)

#uselib "USER32.dll"
#func global DdeAddData "DdeAddData" sptr, sptr, sptr, sptr
; DdeAddData hData, varptr(pSrc), cb, cbOff   ; 戻り値は stat
; hData : HDDEDATA -> "sptr"
; pSrc : BYTE* -> "sptr"
; cb : DWORD -> "sptr"
; cbOff : DWORD -> "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 "USER32.dll"
#cfunc global DdeAddData "DdeAddData" sptr, var, int, int
; res = DdeAddData(hData, pSrc, cb, cbOff)
; hData : HDDEDATA -> "sptr"
; pSrc : BYTE* -> "var"
; cb : DWORD -> "int"
; cbOff : DWORD -> "int"
; ※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。

; HDDEDATA DdeAddData(HDDEDATA hData, BYTE* pSrc, DWORD cb, DWORD cbOff)
#uselib "USER32.dll"
#cfunc global DdeAddData "DdeAddData" intptr, var, int, int
; res = DdeAddData(hData, pSrc, cb, cbOff)
; hData : HDDEDATA -> "intptr"
; pSrc : BYTE* -> "var"
; cb : DWORD -> "int"
; cbOff : DWORD -> "int"
; ※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 (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procDdeAddData = user32.NewProc("DdeAddData")
)

// hData (HDDEDATA), pSrc (BYTE*), cb (DWORD), cbOff (DWORD)
r1, _, err := procDdeAddData.Call(
	uintptr(hData),
	uintptr(pSrc),
	uintptr(cb),
	uintptr(cbOff),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HDDEDATA

function DdeAddData(
  hData: THandle;   // HDDEDATA
  pSrc: Pointer;   // BYTE*
  cb: DWORD;   // DWORD
  cbOff: DWORD   // DWORD
): THandle; stdcall;
  external 'USER32.dll' name 'DdeAddData';

result := DllCall("USER32\DdeAddData"
    , "Ptr", hData   ; HDDEDATA
    , "Ptr", pSrc   ; BYTE*
    , "UInt", cb   ; DWORD
    , "UInt", cbOff   ; DWORD
    , "Ptr")   ; return: HDDEDATA

●DdeAddData(hData, pSrc, cb, cbOff) = DLL("USER32.dll", "void* DdeAddData(void*, void*, dword, dword)")
# 呼び出し: DdeAddData(hData, pSrc, cb, cbOff)
# hData : HDDEDATA -> "void*"
# pSrc : BYTE* -> "void*"
# cb : DWORD -> "dword"
# cbOff : DWORD -> "dword"
# 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)。