ucal_clearField

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

void ucal_clearField(
    void** cal,
    UCalendarDateFields field
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Sub ucal_clearField(
    cal As IntPtr,   ' void** in/out
    field As Integer   ' UCalendarDateFields
)
End Sub

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

import ctypes
from ctypes import wintypes

ucal_clearField = ctypes.cdll.icuin.ucal_clearField
ucal_clearField.restype = None
ucal_clearField.argtypes = [
    ctypes.c_void_p,  # cal : void** in/out
    ctypes.c_int,  # field : UCalendarDateFields
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
ucal_clearField = Fiddle::Function.new(
  lib['ucal_clearField'],
  [
    Fiddle::TYPE_VOIDP,  # cal : void** in/out
    Fiddle::TYPE_INT,  # field : UCalendarDateFields
  ],
  Fiddle::TYPE_VOID, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn ucal_clearField(
        cal: *mut *mut (),  // void** in/out
        field: i32  // UCalendarDateFields
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuin.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern void ucal_clearField(IntPtr cal, int field);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuin_ucal_clearField' -Namespace Win32 -PassThru
# $api::ucal_clearField(cal, field)

#uselib "icuin.dll"
#func global ucal_clearField "ucal_clearField" sptr, sptr
; ucal_clearField cal, field
; cal : void** in/out -> "sptr"
; field : UCalendarDateFields -> "sptr"

#uselib "icuin.dll"
#func global ucal_clearField "ucal_clearField" sptr, int
; ucal_clearField cal, field
; cal : void** in/out -> "sptr"
; field : UCalendarDateFields -> "int"

; void ucal_clearField(void** cal, UCalendarDateFields field)
#uselib "icuin.dll"
#func global ucal_clearField "ucal_clearField" intptr, int
; ucal_clearField cal, field
; cal : void** in/out -> "intptr"
; field : UCalendarDateFields -> "int"

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

var (
	icuin = windows.NewLazySystemDLL("icuin.dll")
	procucal_clearField = icuin.NewProc("ucal_clearField")
)

// cal (void** in/out), field (UCalendarDateFields)
r1, _, err := procucal_clearField.Call(
	uintptr(cal),
	uintptr(field),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure ucal_clearField(
  cal: Pointer;   // void** in/out
  field: Integer   // UCalendarDateFields
); cdecl;
  external 'icuin.dll' name 'ucal_clearField';

result := DllCall("icuin\ucal_clearField"
    , "Ptr", cal   ; void** in/out
    , "Int", field   ; UCalendarDateFields
    , "Cdecl Int")   ; return: void

●ucal_clearField(cal, field) = DLL("icuin.dll", "int ucal_clearField(void*, int)")
# 呼び出し: ucal_clearField(cal, field)
# cal : void** in/out -> "void*"
# field : UCalendarDateFields -> "int"
# 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。