ComDBClaimNextFreePort

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

INT ComDBClaimNextFreePort(
    HCOMDB HComDB,
    DWORD* ComNumber
);

<DllImport("MSPORTS.dll", ExactSpelling:=True)>
Public Shared Function ComDBClaimNextFreePort(
    HComDB As IntPtr,   ' HCOMDB
    <Out> ByRef ComNumber As UInteger   ' DWORD* out
) As Integer
End Function

' HComDB : HCOMDB
' ComNumber : DWORD* out
Declare PtrSafe Function ComDBClaimNextFreePort Lib "msports" ( _
    ByVal HComDB As LongPtr, _
    ByRef ComNumber As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ComDBClaimNextFreePort = ctypes.windll.msports.ComDBClaimNextFreePort
ComDBClaimNextFreePort.restype = ctypes.c_int
ComDBClaimNextFreePort.argtypes = [
    wintypes.HANDLE,  # HComDB : HCOMDB
    ctypes.POINTER(wintypes.DWORD),  # ComNumber : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MSPORTS.dll')
ComDBClaimNextFreePort = Fiddle::Function.new(
  lib['ComDBClaimNextFreePort'],
  [
    Fiddle::TYPE_VOIDP,  # HComDB : HCOMDB
    Fiddle::TYPE_VOIDP,  # ComNumber : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "msports")]
extern "system" {
    fn ComDBClaimNextFreePort(
        HComDB: *mut core::ffi::c_void,  // HCOMDB
        ComNumber: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MSPORTS.dll")]
public static extern int ComDBClaimNextFreePort(IntPtr HComDB, out uint ComNumber);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MSPORTS_ComDBClaimNextFreePort' -Namespace Win32 -PassThru
# $api::ComDBClaimNextFreePort(HComDB, ComNumber)

#uselib "MSPORTS.dll"
#func global ComDBClaimNextFreePort "ComDBClaimNextFreePort" sptr, sptr
; ComDBClaimNextFreePort HComDB, varptr(ComNumber)   ; 戻り値は stat
; HComDB : HCOMDB -> "sptr"
; ComNumber : DWORD* 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 "MSPORTS.dll"
#cfunc global ComDBClaimNextFreePort "ComDBClaimNextFreePort" sptr, var
; res = ComDBClaimNextFreePort(HComDB, ComNumber)
; HComDB : HCOMDB -> "sptr"
; ComNumber : DWORD* 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。

; INT ComDBClaimNextFreePort(HCOMDB HComDB, DWORD* ComNumber)
#uselib "MSPORTS.dll"
#cfunc global ComDBClaimNextFreePort "ComDBClaimNextFreePort" intptr, var
; res = ComDBClaimNextFreePort(HComDB, ComNumber)
; HComDB : HCOMDB -> "intptr"
; ComNumber : DWORD* 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 (
	msports = windows.NewLazySystemDLL("MSPORTS.dll")
	procComDBClaimNextFreePort = msports.NewProc("ComDBClaimNextFreePort")
)

// HComDB (HCOMDB), ComNumber (DWORD* out)
r1, _, err := procComDBClaimNextFreePort.Call(
	uintptr(HComDB),
	uintptr(ComNumber),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function ComDBClaimNextFreePort(
  HComDB: THandle;   // HCOMDB
  ComNumber: Pointer   // DWORD* out
): Integer; stdcall;
  external 'MSPORTS.dll' name 'ComDBClaimNextFreePort';

result := DllCall("MSPORTS\ComDBClaimNextFreePort"
    , "Ptr", HComDB   ; HCOMDB
    , "Ptr", ComNumber   ; DWORD* out
    , "Int")   ; return: INT

●ComDBClaimNextFreePort(HComDB, ComNumber) = DLL("MSPORTS.dll", "int ComDBClaimNextFreePort(void*, void*)")
# 呼び出し: ComDBClaimNextFreePort(HComDB, ComNumber)
# HComDB : HCOMDB -> "void*"
# ComNumber : DWORD* 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)。