PathSetDlgItemPathW

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

void PathSetDlgItemPathW(
    HWND hDlg,
    INT id,
    LPCWSTR pszPath
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Sub PathSetDlgItemPathW(
    hDlg As IntPtr,   ' HWND
    id As Integer,   ' INT
    <MarshalAs(UnmanagedType.LPWStr)> pszPath As String   ' LPCWSTR
)
End Sub

' hDlg : HWND
' id : INT
' pszPath : LPCWSTR
Declare PtrSafe Sub PathSetDlgItemPathW Lib "shlwapi" ( _
    ByVal hDlg As LongPtr, _
    ByVal id As Long, _
    ByVal pszPath 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

PathSetDlgItemPathW = ctypes.windll.shlwapi.PathSetDlgItemPathW
PathSetDlgItemPathW.restype = None
PathSetDlgItemPathW.argtypes = [
    wintypes.HANDLE,  # hDlg : HWND
    ctypes.c_int,  # id : INT
    wintypes.LPCWSTR,  # pszPath : LPCWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
PathSetDlgItemPathW = Fiddle::Function.new(
  lib['PathSetDlgItemPathW'],
  [
    Fiddle::TYPE_VOIDP,  # hDlg : HWND
    Fiddle::TYPE_INT,  # id : INT
    Fiddle::TYPE_VOIDP,  # pszPath : LPCWSTR
  ],
  Fiddle::TYPE_VOID)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "shlwapi")]
extern "system" {
    fn PathSetDlgItemPathW(
        hDlg: *mut core::ffi::c_void,  // HWND
        id: i32,  // INT
        pszPath: *const u16  // LPCWSTR
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll", CharSet = CharSet.Unicode)]
public static extern void PathSetDlgItemPathW(IntPtr hDlg, int id, [MarshalAs(UnmanagedType.LPWStr)] string pszPath);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_PathSetDlgItemPathW' -Namespace Win32 -PassThru
# $api::PathSetDlgItemPathW(hDlg, id, pszPath)

#uselib "SHLWAPI.dll"
#func global PathSetDlgItemPathW "PathSetDlgItemPathW" wptr, wptr, wptr
; PathSetDlgItemPathW hDlg, id, pszPath
; hDlg : HWND -> "wptr"
; id : INT -> "wptr"
; pszPath : LPCWSTR -> "wptr"

#uselib "SHLWAPI.dll"
#func global PathSetDlgItemPathW "PathSetDlgItemPathW" sptr, int, wstr
; PathSetDlgItemPathW hDlg, id, pszPath
; hDlg : HWND -> "sptr"
; id : INT -> "int"
; pszPath : LPCWSTR -> "wstr"

; void PathSetDlgItemPathW(HWND hDlg, INT id, LPCWSTR pszPath)
#uselib "SHLWAPI.dll"
#func global PathSetDlgItemPathW "PathSetDlgItemPathW" intptr, int, wstr
; PathSetDlgItemPathW hDlg, id, pszPath
; hDlg : HWND -> "intptr"
; id : INT -> "int"
; pszPath : LPCWSTR -> "wstr"

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

var (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procPathSetDlgItemPathW = shlwapi.NewProc("PathSetDlgItemPathW")
)

// hDlg (HWND), id (INT), pszPath (LPCWSTR)
r1, _, err := procPathSetDlgItemPathW.Call(
	uintptr(hDlg),
	uintptr(id),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszPath))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure PathSetDlgItemPathW(
  hDlg: THandle;   // HWND
  id: Integer;   // INT
  pszPath: PWideChar   // LPCWSTR
); stdcall;
  external 'SHLWAPI.dll' name 'PathSetDlgItemPathW';

result := DllCall("SHLWAPI\PathSetDlgItemPathW"
    , "Ptr", hDlg   ; HWND
    , "Int", id   ; INT
    , "WStr", pszPath   ; LPCWSTR
    , "Int")   ; return: void

●PathSetDlgItemPathW(hDlg, id, pszPath) = DLL("SHLWAPI.dll", "int PathSetDlgItemPathW(void*, int, char*)")
# 呼び出し: PathSetDlgItemPathW(hDlg, id, pszPath)
# hDlg : HWND -> "void*"
# id : INT -> "int"
# pszPath : 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。