ImmGetCandidateWindow

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

BOOL ImmGetCandidateWindow(
    HIMC param0,
    DWORD param1,
    CANDIDATEFORM* lpCandidate
);

<DllImport("IMM32.dll", ExactSpelling:=True)>
Public Shared Function ImmGetCandidateWindow(
    param0 As IntPtr,   ' HIMC
    param1 As UInteger,   ' DWORD
    lpCandidate As IntPtr   ' CANDIDATEFORM* out
) As Boolean
End Function

' param0 : HIMC
' param1 : DWORD
' lpCandidate : CANDIDATEFORM* out
Declare PtrSafe Function ImmGetCandidateWindow Lib "imm32" ( _
    ByVal param0 As LongPtr, _
    ByVal param1 As Long, _
    ByVal lpCandidate 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

ImmGetCandidateWindow = ctypes.windll.imm32.ImmGetCandidateWindow
ImmGetCandidateWindow.restype = wintypes.BOOL
ImmGetCandidateWindow.argtypes = [
    wintypes.HANDLE,  # param0 : HIMC
    wintypes.DWORD,  # param1 : DWORD
    ctypes.c_void_p,  # lpCandidate : CANDIDATEFORM* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('IMM32.dll')
ImmGetCandidateWindow = Fiddle::Function.new(
  lib['ImmGetCandidateWindow'],
  [
    Fiddle::TYPE_VOIDP,  # param0 : HIMC
    -Fiddle::TYPE_INT,  # param1 : DWORD
    Fiddle::TYPE_VOIDP,  # lpCandidate : CANDIDATEFORM* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "imm32")]
extern "system" {
    fn ImmGetCandidateWindow(
        param0: *mut core::ffi::c_void,  // HIMC
        param1: u32,  // DWORD
        lpCandidate: *mut CANDIDATEFORM  // CANDIDATEFORM* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("IMM32.dll")]
public static extern bool ImmGetCandidateWindow(IntPtr param0, uint param1, IntPtr lpCandidate);
"@
$api = Add-Type -MemberDefinition $sig -Name 'IMM32_ImmGetCandidateWindow' -Namespace Win32 -PassThru
# $api::ImmGetCandidateWindow(param0, param1, lpCandidate)

#uselib "IMM32.dll"
#func global ImmGetCandidateWindow "ImmGetCandidateWindow" sptr, sptr, sptr
; ImmGetCandidateWindow param0, param1, varptr(lpCandidate)   ; 戻り値は stat
; param0 : HIMC -> "sptr"
; param1 : DWORD -> "sptr"
; lpCandidate : CANDIDATEFORM* 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 "IMM32.dll"
#cfunc global ImmGetCandidateWindow "ImmGetCandidateWindow" sptr, int, var
; res = ImmGetCandidateWindow(param0, param1, lpCandidate)
; param0 : HIMC -> "sptr"
; param1 : DWORD -> "int"
; lpCandidate : CANDIDATEFORM* 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。

; BOOL ImmGetCandidateWindow(HIMC param0, DWORD param1, CANDIDATEFORM* lpCandidate)
#uselib "IMM32.dll"
#cfunc global ImmGetCandidateWindow "ImmGetCandidateWindow" intptr, int, var
; res = ImmGetCandidateWindow(param0, param1, lpCandidate)
; param0 : HIMC -> "intptr"
; param1 : DWORD -> "int"
; lpCandidate : CANDIDATEFORM* 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 (
	imm32 = windows.NewLazySystemDLL("IMM32.dll")
	procImmGetCandidateWindow = imm32.NewProc("ImmGetCandidateWindow")
)

// param0 (HIMC), param1 (DWORD), lpCandidate (CANDIDATEFORM* out)
r1, _, err := procImmGetCandidateWindow.Call(
	uintptr(param0),
	uintptr(param1),
	uintptr(lpCandidate),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function ImmGetCandidateWindow(
  param0: THandle;   // HIMC
  param1: DWORD;   // DWORD
  lpCandidate: Pointer   // CANDIDATEFORM* out
): BOOL; stdcall;
  external 'IMM32.dll' name 'ImmGetCandidateWindow';

result := DllCall("IMM32\ImmGetCandidateWindow"
    , "Ptr", param0   ; HIMC
    , "UInt", param1   ; DWORD
    , "Ptr", lpCandidate   ; CANDIDATEFORM* out
    , "Int")   ; return: BOOL

●ImmGetCandidateWindow(param0, param1, lpCandidate) = DLL("IMM32.dll", "bool ImmGetCandidateWindow(void*, dword, void*)")
# 呼び出し: ImmGetCandidateWindow(param0, param1, lpCandidate)
# param0 : HIMC -> "void*"
# param1 : DWORD -> "dword"
# lpCandidate : CANDIDATEFORM* 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)。