udat_setCalendar

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

void udat_setCalendar(
    void** fmt,
    const void** calendarToSet
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Sub udat_setCalendar(
    fmt As IntPtr,   ' void** in/out
    calendarToSet As IntPtr   ' void**
)
End Sub

' fmt : void** in/out
' calendarToSet : void**
Declare PtrSafe Sub udat_setCalendar Lib "icuin" ( _
    ByVal fmt As LongPtr, _
    ByVal calendarToSet As LongPtr)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

udat_setCalendar = ctypes.cdll.icuin.udat_setCalendar
udat_setCalendar.restype = None
udat_setCalendar.argtypes = [
    ctypes.c_void_p,  # fmt : void** in/out
    ctypes.c_void_p,  # calendarToSet : void**
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
udat_setCalendar = Fiddle::Function.new(
  lib['udat_setCalendar'],
  [
    Fiddle::TYPE_VOIDP,  # fmt : void** in/out
    Fiddle::TYPE_VOIDP,  # calendarToSet : void**
  ],
  Fiddle::TYPE_VOID, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn udat_setCalendar(
        fmt: *mut *mut (),  // void** in/out
        calendarToSet: *const *const ()  // void**
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuin.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern void udat_setCalendar(IntPtr fmt, IntPtr calendarToSet);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuin_udat_setCalendar' -Namespace Win32 -PassThru
# $api::udat_setCalendar(fmt, calendarToSet)

#uselib "icuin.dll"
#func global udat_setCalendar "udat_setCalendar" sptr, sptr
; udat_setCalendar fmt, calendarToSet
; fmt : void** in/out -> "sptr"
; calendarToSet : void** -> "sptr"

#uselib "icuin.dll"
#func global udat_setCalendar "udat_setCalendar" sptr, sptr
; udat_setCalendar fmt, calendarToSet
; fmt : void** in/out -> "sptr"
; calendarToSet : void** -> "sptr"

; void udat_setCalendar(void** fmt, void** calendarToSet)
#uselib "icuin.dll"
#func global udat_setCalendar "udat_setCalendar" intptr, intptr
; udat_setCalendar fmt, calendarToSet
; fmt : void** in/out -> "intptr"
; calendarToSet : void** -> "intptr"

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

var (
	icuin = windows.NewLazySystemDLL("icuin.dll")
	procudat_setCalendar = icuin.NewProc("udat_setCalendar")
)

// fmt (void** in/out), calendarToSet (void**)
r1, _, err := procudat_setCalendar.Call(
	uintptr(fmt),
	uintptr(calendarToSet),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure udat_setCalendar(
  fmt: Pointer;   // void** in/out
  calendarToSet: Pointer   // void**
); cdecl;
  external 'icuin.dll' name 'udat_setCalendar';

result := DllCall("icuin\udat_setCalendar"
    , "Ptr", fmt   ; void** in/out
    , "Ptr", calendarToSet   ; void**
    , "Cdecl Int")   ; return: void

●udat_setCalendar(fmt, calendarToSet) = DLL("icuin.dll", "int udat_setCalendar(void*, void*)")
# 呼び出し: udat_setCalendar(fmt, calendarToSet)
# fmt : void** in/out -> "void*"
# calendarToSet : void** -> "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)。
# ※cdecl関数。DLL()宣言はstdcall前提。cdeclは EXEC_PTR(`cdecl`,…) を使用。