WsGetPolicyAlternativeCount

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

HRESULT WsGetPolicyAlternativeCount(
    WS_POLICY* policy,
    DWORD* count,
    WS_ERROR* error   // optional
);

<DllImport("webservices.dll", ExactSpelling:=True)>
Public Shared Function WsGetPolicyAlternativeCount(
    ByRef policy As IntPtr,   ' WS_POLICY*
    <Out> ByRef count As UInteger,   ' DWORD* out
    [error] As IntPtr   ' WS_ERROR* optional
) As Integer
End Function

' policy : WS_POLICY*
' count : DWORD* out
' error : WS_ERROR* optional
Declare PtrSafe Function WsGetPolicyAlternativeCount Lib "webservices" ( _
    ByRef policy As LongPtr, _
    ByRef count As Long, _
    ByVal error 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

WsGetPolicyAlternativeCount = ctypes.windll.webservices.WsGetPolicyAlternativeCount
WsGetPolicyAlternativeCount.restype = ctypes.c_int
WsGetPolicyAlternativeCount.argtypes = [
    ctypes.c_void_p,  # policy : WS_POLICY*
    ctypes.POINTER(wintypes.DWORD),  # count : DWORD* out
    ctypes.c_void_p,  # error : WS_ERROR* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('webservices.dll')
WsGetPolicyAlternativeCount = Fiddle::Function.new(
  lib['WsGetPolicyAlternativeCount'],
  [
    Fiddle::TYPE_VOIDP,  # policy : WS_POLICY*
    Fiddle::TYPE_VOIDP,  # count : DWORD* out
    Fiddle::TYPE_VOIDP,  # error : WS_ERROR* optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "webservices")]
extern "system" {
    fn WsGetPolicyAlternativeCount(
        policy: *mut isize,  // WS_POLICY*
        count: *mut u32,  // DWORD* out
        error: *mut isize  // WS_ERROR* optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("webservices.dll")]
public static extern int WsGetPolicyAlternativeCount(ref IntPtr policy, out uint count, IntPtr error);
"@
$api = Add-Type -MemberDefinition $sig -Name 'webservices_WsGetPolicyAlternativeCount' -Namespace Win32 -PassThru
# $api::WsGetPolicyAlternativeCount(policy, count, error)

#uselib "webservices.dll"
#func global WsGetPolicyAlternativeCount "WsGetPolicyAlternativeCount" sptr, sptr, sptr
; WsGetPolicyAlternativeCount policy, varptr(count), error   ; 戻り値は stat
; policy : WS_POLICY* -> "sptr"
; count : DWORD* out -> "sptr"
; error : WS_ERROR* optional -> "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 "webservices.dll"
#cfunc global WsGetPolicyAlternativeCount "WsGetPolicyAlternativeCount" int, var, int
; res = WsGetPolicyAlternativeCount(policy, count, error)
; policy : WS_POLICY* -> "int"
; count : DWORD* out -> "var"
; error : WS_ERROR* optional -> "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。

; HRESULT WsGetPolicyAlternativeCount(WS_POLICY* policy, DWORD* count, WS_ERROR* error)
#uselib "webservices.dll"
#cfunc global WsGetPolicyAlternativeCount "WsGetPolicyAlternativeCount" int, var, int
; res = WsGetPolicyAlternativeCount(policy, count, error)
; policy : WS_POLICY* -> "int"
; count : DWORD* out -> "var"
; error : WS_ERROR* optional -> "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 (
	webservices = windows.NewLazySystemDLL("webservices.dll")
	procWsGetPolicyAlternativeCount = webservices.NewProc("WsGetPolicyAlternativeCount")
)

// policy (WS_POLICY*), count (DWORD* out), error (WS_ERROR* optional)
r1, _, err := procWsGetPolicyAlternativeCount.Call(
	uintptr(policy),
	uintptr(count),
	uintptr(error),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function WsGetPolicyAlternativeCount(
  policy: Pointer;   // WS_POLICY*
  count: Pointer;   // DWORD* out
  error: Pointer   // WS_ERROR* optional
): Integer; stdcall;
  external 'webservices.dll' name 'WsGetPolicyAlternativeCount';

result := DllCall("webservices\WsGetPolicyAlternativeCount"
    , "Ptr", policy   ; WS_POLICY*
    , "Ptr", count   ; DWORD* out
    , "Ptr", error   ; WS_ERROR* optional
    , "Int")   ; return: HRESULT

●WsGetPolicyAlternativeCount(policy, count, error) = DLL("webservices.dll", "int WsGetPolicyAlternativeCount(void*, void*, void*)")
# 呼び出し: WsGetPolicyAlternativeCount(policy, count, error)
# policy : WS_POLICY* -> "void*"
# count : DWORD* out -> "void*"
# error : WS_ERROR* optional -> "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)。