ImmInstallIMEW

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

HKL ImmInstallIMEW(
    LPCWSTR lpszIMEFileName,
    LPCWSTR lpszLayoutText
);

<DllImport("IMM32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function ImmInstallIMEW(
    <MarshalAs(UnmanagedType.LPWStr)> lpszIMEFileName As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> lpszLayoutText As String   ' LPCWSTR
) As IntPtr
End Function

' lpszIMEFileName : LPCWSTR
' lpszLayoutText : LPCWSTR
Declare PtrSafe Function ImmInstallIMEW Lib "imm32" ( _
    ByVal lpszIMEFileName As LongPtr, _
    ByVal lpszLayoutText As LongPtr) As LongPtr
' 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

ImmInstallIMEW = ctypes.windll.imm32.ImmInstallIMEW
ImmInstallIMEW.restype = ctypes.c_void_p
ImmInstallIMEW.argtypes = [
    wintypes.LPCWSTR,  # lpszIMEFileName : LPCWSTR
    wintypes.LPCWSTR,  # lpszLayoutText : LPCWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('IMM32.dll')
ImmInstallIMEW = Fiddle::Function.new(
  lib['ImmInstallIMEW'],
  [
    Fiddle::TYPE_VOIDP,  # lpszIMEFileName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # lpszLayoutText : LPCWSTR
  ],
  Fiddle::TYPE_VOIDP)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "imm32")]
extern "system" {
    fn ImmInstallIMEW(
        lpszIMEFileName: *const u16,  // LPCWSTR
        lpszLayoutText: *const u16  // LPCWSTR
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("IMM32.dll", CharSet = CharSet.Unicode)]
public static extern IntPtr ImmInstallIMEW([MarshalAs(UnmanagedType.LPWStr)] string lpszIMEFileName, [MarshalAs(UnmanagedType.LPWStr)] string lpszLayoutText);
"@
$api = Add-Type -MemberDefinition $sig -Name 'IMM32_ImmInstallIMEW' -Namespace Win32 -PassThru
# $api::ImmInstallIMEW(lpszIMEFileName, lpszLayoutText)

#uselib "IMM32.dll"
#func global ImmInstallIMEW "ImmInstallIMEW" wptr, wptr
; ImmInstallIMEW lpszIMEFileName, lpszLayoutText   ; 戻り値は stat
; lpszIMEFileName : LPCWSTR -> "wptr"
; lpszLayoutText : LPCWSTR -> "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 ImmInstallIMEW "ImmInstallIMEW" wstr, wstr
; res = ImmInstallIMEW(lpszIMEFileName, lpszLayoutText)
; lpszIMEFileName : LPCWSTR -> "wstr"
; lpszLayoutText : LPCWSTR -> "wstr"

; HKL ImmInstallIMEW(LPCWSTR lpszIMEFileName, LPCWSTR lpszLayoutText)
#uselib "IMM32.dll"
#cfunc global ImmInstallIMEW "ImmInstallIMEW" wstr, wstr
; res = ImmInstallIMEW(lpszIMEFileName, lpszLayoutText)
; lpszIMEFileName : LPCWSTR -> "wstr"
; lpszLayoutText : LPCWSTR -> "wstr"

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

var (
	imm32 = windows.NewLazySystemDLL("IMM32.dll")
	procImmInstallIMEW = imm32.NewProc("ImmInstallIMEW")
)

// lpszIMEFileName (LPCWSTR), lpszLayoutText (LPCWSTR)
r1, _, err := procImmInstallIMEW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszIMEFileName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszLayoutText))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HKL

function ImmInstallIMEW(
  lpszIMEFileName: PWideChar;   // LPCWSTR
  lpszLayoutText: PWideChar   // LPCWSTR
): THandle; stdcall;
  external 'IMM32.dll' name 'ImmInstallIMEW';

result := DllCall("IMM32\ImmInstallIMEW"
    , "WStr", lpszIMEFileName   ; LPCWSTR
    , "WStr", lpszLayoutText   ; LPCWSTR
    , "Ptr")   ; return: HKL

●ImmInstallIMEW(lpszIMEFileName, lpszLayoutText) = DLL("IMM32.dll", "void* ImmInstallIMEW(char*, char*)")
# 呼び出し: ImmInstallIMEW(lpszIMEFileName, lpszLayoutText)
# lpszIMEFileName : LPCWSTR -> "char*"
# lpszLayoutText : LPCWSTR -> "char*"
# 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。