SymSetSearchPath

// dbghelp.dll  (ANSI / -A)
#include <windows.h>

BOOL SymSetSearchPath(
    HANDLE hProcess,
    LPCSTR SearchPathA   // optional
);

<DllImport("dbghelp.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SymSetSearchPath(
    hProcess As IntPtr,   ' HANDLE
    <MarshalAs(UnmanagedType.LPStr)> SearchPathA As String   ' LPCSTR optional
) As Boolean
End Function

' hProcess : HANDLE
' SearchPathA : LPCSTR optional
Declare PtrSafe Function SymSetSearchPath Lib "dbghelp" ( _
    ByVal hProcess As LongPtr, _
    ByVal SearchPathA As String) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SymSetSearchPath = ctypes.windll.dbghelp.SymSetSearchPath
SymSetSearchPath.restype = wintypes.BOOL
SymSetSearchPath.argtypes = [
    wintypes.HANDLE,  # hProcess : HANDLE
    wintypes.LPCSTR,  # SearchPathA : LPCSTR optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dbghelp.dll')
SymSetSearchPath = Fiddle::Function.new(
  lib['SymSetSearchPath'],
  [
    Fiddle::TYPE_VOIDP,  # hProcess : HANDLE
    Fiddle::TYPE_VOIDP,  # SearchPathA : LPCSTR optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "dbghelp")]
extern "system" {
    fn SymSetSearchPath(
        hProcess: *mut core::ffi::c_void,  // HANDLE
        SearchPathA: *const u8  // LPCSTR optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("dbghelp.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern bool SymSetSearchPath(IntPtr hProcess, [MarshalAs(UnmanagedType.LPStr)] string SearchPathA);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dbghelp_SymSetSearchPath' -Namespace Win32 -PassThru
# $api::SymSetSearchPath(hProcess, SearchPathA)

#uselib "dbghelp.dll"
#func global SymSetSearchPath "SymSetSearchPath" sptr, sptr
; SymSetSearchPath hProcess, SearchPathA   ; 戻り値は stat
; hProcess : HANDLE -> "sptr"
; SearchPathA : LPCSTR optional -> "sptr"
; ※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 SymSetSearchPath "SymSetSearchPath" sptr, str
; res = SymSetSearchPath(hProcess, SearchPathA)
; hProcess : HANDLE -> "sptr"
; SearchPathA : LPCSTR optional -> "str"

; BOOL SymSetSearchPath(HANDLE hProcess, LPCSTR SearchPathA)
#uselib "dbghelp.dll"
#cfunc global SymSetSearchPath "SymSetSearchPath" intptr, str
; res = SymSetSearchPath(hProcess, SearchPathA)
; hProcess : HANDLE -> "intptr"
; SearchPathA : LPCSTR optional -> "str"

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

var (
	dbghelp = windows.NewLazySystemDLL("dbghelp.dll")
	procSymSetSearchPath = dbghelp.NewProc("SymSetSearchPath")
)

// hProcess (HANDLE), SearchPathA (LPCSTR optional)
r1, _, err := procSymSetSearchPath.Call(
	uintptr(hProcess),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(SearchPathA))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SymSetSearchPath(
  hProcess: THandle;   // HANDLE
  SearchPathA: PAnsiChar   // LPCSTR optional
): BOOL; stdcall;
  external 'dbghelp.dll' name 'SymSetSearchPath';

result := DllCall("dbghelp\SymSetSearchPath"
    , "Ptr", hProcess   ; HANDLE
    , "AStr", SearchPathA   ; LPCSTR optional
    , "Int")   ; return: BOOL

●SymSetSearchPath(hProcess, SearchPathA) = DLL("dbghelp.dll", "bool SymSetSearchPath(void*, char*)")
# 呼び出し: SymSetSearchPath(hProcess, SearchPathA)
# hProcess : HANDLE -> "void*"
# SearchPathA : LPCSTR optional -> "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)。