SymGetHomeDirectory

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

LPSTR SymGetHomeDirectory(
    DWORD type,
    LPSTR dir,
    UINT_PTR size
);

<DllImport("dbghelp.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SymGetHomeDirectory(
    type As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPStr)> dir As System.Text.StringBuilder,   ' LPSTR out
    size As UIntPtr   ' UINT_PTR
) As IntPtr
End Function

' type : DWORD
' dir : LPSTR out
' size : UINT_PTR
Declare PtrSafe Function SymGetHomeDirectory Lib "dbghelp" ( _
    ByVal type As Long, _
    ByVal dir As String, _
    ByVal size As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SymGetHomeDirectory = ctypes.windll.dbghelp.SymGetHomeDirectory
SymGetHomeDirectory.restype = wintypes.LPSTR
SymGetHomeDirectory.argtypes = [
    wintypes.DWORD,  # type : DWORD
    wintypes.LPSTR,  # dir : LPSTR out
    ctypes.c_size_t,  # size : UINT_PTR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dbghelp.dll')
SymGetHomeDirectory = Fiddle::Function.new(
  lib['SymGetHomeDirectory'],
  [
    -Fiddle::TYPE_INT,  # type : DWORD
    Fiddle::TYPE_VOIDP,  # dir : LPSTR out
    Fiddle::TYPE_UINTPTR_T,  # size : UINT_PTR
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "dbghelp")]
extern "system" {
    fn SymGetHomeDirectory(
        type: u32,  // DWORD
        dir: *mut u8,  // LPSTR out
        size: usize  // UINT_PTR
    ) -> *mut u8;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dbghelp.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern IntPtr SymGetHomeDirectory(uint type, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder dir, UIntPtr size);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dbghelp_SymGetHomeDirectory' -Namespace Win32 -PassThru
# $api::SymGetHomeDirectory(type, dir, size)

#uselib "dbghelp.dll"
#func global SymGetHomeDirectory "SymGetHomeDirectory" sptr, sptr, sptr
; SymGetHomeDirectory type, varptr(dir), size   ; 戻り値は stat
; type : DWORD -> "sptr"
; dir : LPSTR out -> "sptr"
; size : UINT_PTR -> "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 SymGetHomeDirectory "SymGetHomeDirectory" int, var, sptr
; res = SymGetHomeDirectory(type, dir, size)
; type : DWORD -> "int"
; dir : LPSTR out -> "var"
; size : UINT_PTR -> "sptr"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; LPSTR SymGetHomeDirectory(DWORD type, LPSTR dir, UINT_PTR size)
#uselib "dbghelp.dll"
#cfunc global SymGetHomeDirectory "SymGetHomeDirectory" int, var, intptr
; res = SymGetHomeDirectory(type, dir, size)
; type : DWORD -> "int"
; dir : LPSTR out -> "var"
; size : UINT_PTR -> "intptr"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	dbghelp = windows.NewLazySystemDLL("dbghelp.dll")
	procSymGetHomeDirectory = dbghelp.NewProc("SymGetHomeDirectory")
)

// type (DWORD), dir (LPSTR out), size (UINT_PTR)
r1, _, err := procSymGetHomeDirectory.Call(
	uintptr(type),
	uintptr(dir),
	uintptr(size),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // LPSTR

function SymGetHomeDirectory(
  type: DWORD;   // DWORD
  dir: PAnsiChar;   // LPSTR out
  size: NativeUInt   // UINT_PTR
): PAnsiChar; stdcall;
  external 'dbghelp.dll' name 'SymGetHomeDirectory';

result := DllCall("dbghelp\SymGetHomeDirectory"
    , "UInt", type   ; DWORD
    , "Ptr", dir   ; LPSTR out
    , "UPtr", size   ; UINT_PTR
    , "Ptr")   ; return: LPSTR

●SymGetHomeDirectory(type, dir, size) = DLL("dbghelp.dll", "char* SymGetHomeDirectory(dword, char*, int)")
# 呼び出し: SymGetHomeDirectory(type, dir, size)
# type : DWORD -> "dword"
# dir : LPSTR out -> "char*"
# size : UINT_PTR -> "int"
# 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)。