ImmGetCandidateListCountW

// IMM32.dll  (Unicode / -W)
#include <windows.h>

DWORD ImmGetCandidateListCountW(
    HIMC param0,
    DWORD* lpdwListCount
);

<DllImport("IMM32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function ImmGetCandidateListCountW(
    param0 As IntPtr,   ' HIMC
    <Out> ByRef lpdwListCount As UInteger   ' DWORD* out
) As UInteger
End Function

' param0 : HIMC
' lpdwListCount : DWORD* out
Declare PtrSafe Function ImmGetCandidateListCountW Lib "imm32" ( _
    ByVal param0 As LongPtr, _
    ByRef lpdwListCount As Long) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ImmGetCandidateListCountW = ctypes.windll.imm32.ImmGetCandidateListCountW
ImmGetCandidateListCountW.restype = wintypes.DWORD
ImmGetCandidateListCountW.argtypes = [
    wintypes.HANDLE,  # param0 : HIMC
    ctypes.POINTER(wintypes.DWORD),  # lpdwListCount : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('IMM32.dll')
ImmGetCandidateListCountW = Fiddle::Function.new(
  lib['ImmGetCandidateListCountW'],
  [
    Fiddle::TYPE_VOIDP,  # param0 : HIMC
    Fiddle::TYPE_VOIDP,  # lpdwListCount : DWORD* out
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

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

$sig = @"
[DllImport("IMM32.dll", CharSet = CharSet.Unicode)]
public static extern uint ImmGetCandidateListCountW(IntPtr param0, out uint lpdwListCount);
"@
$api = Add-Type -MemberDefinition $sig -Name 'IMM32_ImmGetCandidateListCountW' -Namespace Win32 -PassThru
# $api::ImmGetCandidateListCountW(param0, lpdwListCount)

#uselib "IMM32.dll"
#func global ImmGetCandidateListCountW "ImmGetCandidateListCountW" wptr, wptr
; ImmGetCandidateListCountW param0, varptr(lpdwListCount)   ; 戻り値は stat
; param0 : HIMC -> "wptr"
; lpdwListCount : DWORD* out -> "wptr"
; ※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 ImmGetCandidateListCountW "ImmGetCandidateListCountW" sptr, var
; res = ImmGetCandidateListCountW(param0, lpdwListCount)
; param0 : HIMC -> "sptr"
; lpdwListCount : DWORD* 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。

; DWORD ImmGetCandidateListCountW(HIMC param0, DWORD* lpdwListCount)
#uselib "IMM32.dll"
#cfunc global ImmGetCandidateListCountW "ImmGetCandidateListCountW" intptr, var
; res = ImmGetCandidateListCountW(param0, lpdwListCount)
; param0 : HIMC -> "intptr"
; lpdwListCount : DWORD* 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")
	procImmGetCandidateListCountW = imm32.NewProc("ImmGetCandidateListCountW")
)

// param0 (HIMC), lpdwListCount (DWORD* out)
r1, _, err := procImmGetCandidateListCountW.Call(
	uintptr(param0),
	uintptr(lpdwListCount),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function ImmGetCandidateListCountW(
  param0: THandle;   // HIMC
  lpdwListCount: Pointer   // DWORD* out
): DWORD; stdcall;
  external 'IMM32.dll' name 'ImmGetCandidateListCountW';

result := DllCall("IMM32\ImmGetCandidateListCountW"
    , "Ptr", param0   ; HIMC
    , "Ptr", lpdwListCount   ; DWORD* out
    , "UInt")   ; return: DWORD

●ImmGetCandidateListCountW(param0, lpdwListCount) = DLL("IMM32.dll", "dword ImmGetCandidateListCountW(void*, void*)")
# 呼び出し: ImmGetCandidateListCountW(param0, lpdwListCount)
# param0 : HIMC -> "void*"
# lpdwListCount : DWORD* 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。