SymInitializeW

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

BOOL SymInitializeW(
    HANDLE hProcess,
    LPCWSTR UserSearchPath,   // optional
    BOOL fInvadeProcess
);

<DllImport("dbghelp.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SymInitializeW(
    hProcess As IntPtr,   ' HANDLE
    <MarshalAs(UnmanagedType.LPWStr)> UserSearchPath As String,   ' LPCWSTR optional
    fInvadeProcess As Boolean   ' BOOL
) As Boolean
End Function

' hProcess : HANDLE
' UserSearchPath : LPCWSTR optional
' fInvadeProcess : BOOL
Declare PtrSafe Function SymInitializeW Lib "dbghelp" ( _
    ByVal hProcess As LongPtr, _
    ByVal UserSearchPath As LongPtr, _
    ByVal fInvadeProcess 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

SymInitializeW = ctypes.windll.dbghelp.SymInitializeW
SymInitializeW.restype = wintypes.BOOL
SymInitializeW.argtypes = [
    wintypes.HANDLE,  # hProcess : HANDLE
    wintypes.LPCWSTR,  # UserSearchPath : LPCWSTR optional
    wintypes.BOOL,  # fInvadeProcess : BOOL
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dbghelp.dll')
SymInitializeW = Fiddle::Function.new(
  lib['SymInitializeW'],
  [
    Fiddle::TYPE_VOIDP,  # hProcess : HANDLE
    Fiddle::TYPE_VOIDP,  # UserSearchPath : LPCWSTR optional
    Fiddle::TYPE_INT,  # fInvadeProcess : BOOL
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "dbghelp")]
extern "system" {
    fn SymInitializeW(
        hProcess: *mut core::ffi::c_void,  // HANDLE
        UserSearchPath: *const u16,  // LPCWSTR optional
        fInvadeProcess: i32  // BOOL
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("dbghelp.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool SymInitializeW(IntPtr hProcess, [MarshalAs(UnmanagedType.LPWStr)] string UserSearchPath, bool fInvadeProcess);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dbghelp_SymInitializeW' -Namespace Win32 -PassThru
# $api::SymInitializeW(hProcess, UserSearchPath, fInvadeProcess)

#uselib "dbghelp.dll"
#func global SymInitializeW "SymInitializeW" wptr, wptr, wptr
; SymInitializeW hProcess, UserSearchPath, fInvadeProcess   ; 戻り値は stat
; hProcess : HANDLE -> "wptr"
; UserSearchPath : LPCWSTR optional -> "wptr"
; fInvadeProcess : BOOL -> "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 "dbghelp.dll"
#cfunc global SymInitializeW "SymInitializeW" sptr, wstr, int
; res = SymInitializeW(hProcess, UserSearchPath, fInvadeProcess)
; hProcess : HANDLE -> "sptr"
; UserSearchPath : LPCWSTR optional -> "wstr"
; fInvadeProcess : BOOL -> "int"

; BOOL SymInitializeW(HANDLE hProcess, LPCWSTR UserSearchPath, BOOL fInvadeProcess)
#uselib "dbghelp.dll"
#cfunc global SymInitializeW "SymInitializeW" intptr, wstr, int
; res = SymInitializeW(hProcess, UserSearchPath, fInvadeProcess)
; hProcess : HANDLE -> "intptr"
; UserSearchPath : LPCWSTR optional -> "wstr"
; fInvadeProcess : BOOL -> "int"

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

var (
	dbghelp = windows.NewLazySystemDLL("dbghelp.dll")
	procSymInitializeW = dbghelp.NewProc("SymInitializeW")
)

// hProcess (HANDLE), UserSearchPath (LPCWSTR optional), fInvadeProcess (BOOL)
r1, _, err := procSymInitializeW.Call(
	uintptr(hProcess),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(UserSearchPath))),
	uintptr(fInvadeProcess),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SymInitializeW(
  hProcess: THandle;   // HANDLE
  UserSearchPath: PWideChar;   // LPCWSTR optional
  fInvadeProcess: BOOL   // BOOL
): BOOL; stdcall;
  external 'dbghelp.dll' name 'SymInitializeW';

result := DllCall("dbghelp\SymInitializeW"
    , "Ptr", hProcess   ; HANDLE
    , "WStr", UserSearchPath   ; LPCWSTR optional
    , "Int", fInvadeProcess   ; BOOL
    , "Int")   ; return: BOOL

●SymInitializeW(hProcess, UserSearchPath, fInvadeProcess) = DLL("dbghelp.dll", "bool SymInitializeW(void*, char*, bool)")
# 呼び出し: SymInitializeW(hProcess, UserSearchPath, fInvadeProcess)
# hProcess : HANDLE -> "void*"
# UserSearchPath : LPCWSTR optional -> "char*"
# fInvadeProcess : BOOL -> "bool"
# 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。