ImmEnumInputContext

// IMM32.dll
#include <windows.h>

BOOL ImmEnumInputContext(
    DWORD idThread,
    IMCENUMPROC lpfn,
    LPARAM lParam
);

<DllImport("IMM32.dll", ExactSpelling:=True)>
Public Shared Function ImmEnumInputContext(
    idThread As UInteger,   ' DWORD
    lpfn As IntPtr,   ' IMCENUMPROC
    lParam As IntPtr   ' LPARAM
) As Boolean
End Function

' idThread : DWORD
' lpfn : IMCENUMPROC
' lParam : LPARAM
Declare PtrSafe Function ImmEnumInputContext Lib "imm32" ( _
    ByVal idThread As Long, _
    ByVal lpfn As LongPtr, _
    ByVal lParam 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

ImmEnumInputContext = ctypes.windll.imm32.ImmEnumInputContext
ImmEnumInputContext.restype = wintypes.BOOL
ImmEnumInputContext.argtypes = [
    wintypes.DWORD,  # idThread : DWORD
    ctypes.c_void_p,  # lpfn : IMCENUMPROC
    ctypes.c_ssize_t,  # lParam : LPARAM
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('IMM32.dll')
ImmEnumInputContext = Fiddle::Function.new(
  lib['ImmEnumInputContext'],
  [
    -Fiddle::TYPE_INT,  # idThread : DWORD
    Fiddle::TYPE_VOIDP,  # lpfn : IMCENUMPROC
    Fiddle::TYPE_INTPTR_T,  # lParam : LPARAM
  ],
  Fiddle::TYPE_INT)

#[link(name = "imm32")]
extern "system" {
    fn ImmEnumInputContext(
        idThread: u32,  // DWORD
        lpfn: *const core::ffi::c_void,  // IMCENUMPROC
        lParam: isize  // LPARAM
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("IMM32.dll")]
public static extern bool ImmEnumInputContext(uint idThread, IntPtr lpfn, IntPtr lParam);
"@
$api = Add-Type -MemberDefinition $sig -Name 'IMM32_ImmEnumInputContext' -Namespace Win32 -PassThru
# $api::ImmEnumInputContext(idThread, lpfn, lParam)

#uselib "IMM32.dll"
#func global ImmEnumInputContext "ImmEnumInputContext" sptr, sptr, sptr
; ImmEnumInputContext idThread, lpfn, lParam   ; 戻り値は stat
; idThread : DWORD -> "sptr"
; lpfn : IMCENUMPROC -> "sptr"
; lParam : LPARAM -> "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 "IMM32.dll"
#cfunc global ImmEnumInputContext "ImmEnumInputContext" int, sptr, sptr
; res = ImmEnumInputContext(idThread, lpfn, lParam)
; idThread : DWORD -> "int"
; lpfn : IMCENUMPROC -> "sptr"
; lParam : LPARAM -> "sptr"

; BOOL ImmEnumInputContext(DWORD idThread, IMCENUMPROC lpfn, LPARAM lParam)
#uselib "IMM32.dll"
#cfunc global ImmEnumInputContext "ImmEnumInputContext" int, intptr, intptr
; res = ImmEnumInputContext(idThread, lpfn, lParam)
; idThread : DWORD -> "int"
; lpfn : IMCENUMPROC -> "intptr"
; lParam : LPARAM -> "intptr"

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

var (
	imm32 = windows.NewLazySystemDLL("IMM32.dll")
	procImmEnumInputContext = imm32.NewProc("ImmEnumInputContext")
)

// idThread (DWORD), lpfn (IMCENUMPROC), lParam (LPARAM)
r1, _, err := procImmEnumInputContext.Call(
	uintptr(idThread),
	uintptr(lpfn),
	uintptr(lParam),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function ImmEnumInputContext(
  idThread: DWORD;   // DWORD
  lpfn: Pointer;   // IMCENUMPROC
  lParam: NativeInt   // LPARAM
): BOOL; stdcall;
  external 'IMM32.dll' name 'ImmEnumInputContext';

result := DllCall("IMM32\ImmEnumInputContext"
    , "UInt", idThread   ; DWORD
    , "Ptr", lpfn   ; IMCENUMPROC
    , "Ptr", lParam   ; LPARAM
    , "Int")   ; return: BOOL

●ImmEnumInputContext(idThread, lpfn, lParam) = DLL("IMM32.dll", "bool ImmEnumInputContext(dword, void*, int)")
# 呼び出し: ImmEnumInputContext(idThread, lpfn, lParam)
# idThread : DWORD -> "dword"
# lpfn : IMCENUMPROC -> "void*"
# lParam : LPARAM -> "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)。