ImmSetCompositionStringW

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

BOOL ImmSetCompositionStringW(
    HIMC param0,
    SET_COMPOSITION_STRING_TYPE dwIndex,
    void* lpComp,   // optional
    DWORD dwCompLen,
    void* lpRead,   // optional
    DWORD dwReadLen
);

<DllImport("IMM32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function ImmSetCompositionStringW(
    param0 As IntPtr,   ' HIMC
    dwIndex As UInteger,   ' SET_COMPOSITION_STRING_TYPE
    lpComp As IntPtr,   ' void* optional
    dwCompLen As UInteger,   ' DWORD
    lpRead As IntPtr,   ' void* optional
    dwReadLen As UInteger   ' DWORD
) As Boolean
End Function

' param0 : HIMC
' dwIndex : SET_COMPOSITION_STRING_TYPE
' lpComp : void* optional
' dwCompLen : DWORD
' lpRead : void* optional
' dwReadLen : DWORD
Declare PtrSafe Function ImmSetCompositionStringW Lib "imm32" ( _
    ByVal param0 As LongPtr, _
    ByVal dwIndex As Long, _
    ByVal lpComp As LongPtr, _
    ByVal dwCompLen As Long, _
    ByVal lpRead As LongPtr, _
    ByVal dwReadLen 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

ImmSetCompositionStringW = ctypes.windll.imm32.ImmSetCompositionStringW
ImmSetCompositionStringW.restype = wintypes.BOOL
ImmSetCompositionStringW.argtypes = [
    wintypes.HANDLE,  # param0 : HIMC
    wintypes.DWORD,  # dwIndex : SET_COMPOSITION_STRING_TYPE
    ctypes.POINTER(None),  # lpComp : void* optional
    wintypes.DWORD,  # dwCompLen : DWORD
    ctypes.POINTER(None),  # lpRead : void* optional
    wintypes.DWORD,  # dwReadLen : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('IMM32.dll')
ImmSetCompositionStringW = Fiddle::Function.new(
  lib['ImmSetCompositionStringW'],
  [
    Fiddle::TYPE_VOIDP,  # param0 : HIMC
    -Fiddle::TYPE_INT,  # dwIndex : SET_COMPOSITION_STRING_TYPE
    Fiddle::TYPE_VOIDP,  # lpComp : void* optional
    -Fiddle::TYPE_INT,  # dwCompLen : DWORD
    Fiddle::TYPE_VOIDP,  # lpRead : void* optional
    -Fiddle::TYPE_INT,  # dwReadLen : DWORD
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "imm32")]
extern "system" {
    fn ImmSetCompositionStringW(
        param0: *mut core::ffi::c_void,  // HIMC
        dwIndex: u32,  // SET_COMPOSITION_STRING_TYPE
        lpComp: *mut (),  // void* optional
        dwCompLen: u32,  // DWORD
        lpRead: *mut (),  // void* optional
        dwReadLen: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("IMM32.dll", CharSet = CharSet.Unicode)]
public static extern bool ImmSetCompositionStringW(IntPtr param0, uint dwIndex, IntPtr lpComp, uint dwCompLen, IntPtr lpRead, uint dwReadLen);
"@
$api = Add-Type -MemberDefinition $sig -Name 'IMM32_ImmSetCompositionStringW' -Namespace Win32 -PassThru
# $api::ImmSetCompositionStringW(param0, dwIndex, lpComp, dwCompLen, lpRead, dwReadLen)

#uselib "IMM32.dll"
#func global ImmSetCompositionStringW "ImmSetCompositionStringW" wptr, wptr, wptr, wptr, wptr, wptr
; ImmSetCompositionStringW param0, dwIndex, lpComp, dwCompLen, lpRead, dwReadLen   ; 戻り値は stat
; param0 : HIMC -> "wptr"
; dwIndex : SET_COMPOSITION_STRING_TYPE -> "wptr"
; lpComp : void* optional -> "wptr"
; dwCompLen : DWORD -> "wptr"
; lpRead : void* optional -> "wptr"
; dwReadLen : DWORD -> "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 ImmSetCompositionStringW "ImmSetCompositionStringW" sptr, int, sptr, int, sptr, int
; res = ImmSetCompositionStringW(param0, dwIndex, lpComp, dwCompLen, lpRead, dwReadLen)
; param0 : HIMC -> "sptr"
; dwIndex : SET_COMPOSITION_STRING_TYPE -> "int"
; lpComp : void* optional -> "sptr"
; dwCompLen : DWORD -> "int"
; lpRead : void* optional -> "sptr"
; dwReadLen : DWORD -> "int"

; BOOL ImmSetCompositionStringW(HIMC param0, SET_COMPOSITION_STRING_TYPE dwIndex, void* lpComp, DWORD dwCompLen, void* lpRead, DWORD dwReadLen)
#uselib "IMM32.dll"
#cfunc global ImmSetCompositionStringW "ImmSetCompositionStringW" intptr, int, intptr, int, intptr, int
; res = ImmSetCompositionStringW(param0, dwIndex, lpComp, dwCompLen, lpRead, dwReadLen)
; param0 : HIMC -> "intptr"
; dwIndex : SET_COMPOSITION_STRING_TYPE -> "int"
; lpComp : void* optional -> "intptr"
; dwCompLen : DWORD -> "int"
; lpRead : void* optional -> "intptr"
; dwReadLen : DWORD -> "int"

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

var (
	imm32 = windows.NewLazySystemDLL("IMM32.dll")
	procImmSetCompositionStringW = imm32.NewProc("ImmSetCompositionStringW")
)

// param0 (HIMC), dwIndex (SET_COMPOSITION_STRING_TYPE), lpComp (void* optional), dwCompLen (DWORD), lpRead (void* optional), dwReadLen (DWORD)
r1, _, err := procImmSetCompositionStringW.Call(
	uintptr(param0),
	uintptr(dwIndex),
	uintptr(lpComp),
	uintptr(dwCompLen),
	uintptr(lpRead),
	uintptr(dwReadLen),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function ImmSetCompositionStringW(
  param0: THandle;   // HIMC
  dwIndex: DWORD;   // SET_COMPOSITION_STRING_TYPE
  lpComp: Pointer;   // void* optional
  dwCompLen: DWORD;   // DWORD
  lpRead: Pointer;   // void* optional
  dwReadLen: DWORD   // DWORD
): BOOL; stdcall;
  external 'IMM32.dll' name 'ImmSetCompositionStringW';

result := DllCall("IMM32\ImmSetCompositionStringW"
    , "Ptr", param0   ; HIMC
    , "UInt", dwIndex   ; SET_COMPOSITION_STRING_TYPE
    , "Ptr", lpComp   ; void* optional
    , "UInt", dwCompLen   ; DWORD
    , "Ptr", lpRead   ; void* optional
    , "UInt", dwReadLen   ; DWORD
    , "Int")   ; return: BOOL

●ImmSetCompositionStringW(param0, dwIndex, lpComp, dwCompLen, lpRead, dwReadLen) = DLL("IMM32.dll", "bool ImmSetCompositionStringW(void*, dword, void*, dword, void*, dword)")
# 呼び出し: ImmSetCompositionStringW(param0, dwIndex, lpComp, dwCompLen, lpRead, dwReadLen)
# param0 : HIMC -> "void*"
# dwIndex : SET_COMPOSITION_STRING_TYPE -> "dword"
# lpComp : void* optional -> "void*"
# dwCompLen : DWORD -> "dword"
# lpRead : void* optional -> "void*"
# dwReadLen : DWORD -> "dword"
# 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。