GetTempPath2A

// KERNEL32.dll  (ANSI / -A)
#include <windows.h>

DWORD GetTempPath2A(
    DWORD BufferLength,
    LPSTR Buffer   // optional
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function GetTempPath2A(
    BufferLength As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPStr)> Buffer As System.Text.StringBuilder   ' LPSTR optional, out
) As UInteger
End Function

' BufferLength : DWORD
' Buffer : LPSTR optional, out
Declare PtrSafe Function GetTempPath2A Lib "kernel32" ( _
    ByVal BufferLength As Long, _
    ByVal Buffer 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

GetTempPath2A = ctypes.windll.kernel32.GetTempPath2A
GetTempPath2A.restype = wintypes.DWORD
GetTempPath2A.argtypes = [
    wintypes.DWORD,  # BufferLength : DWORD
    wintypes.LPSTR,  # Buffer : LPSTR optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetTempPath2A = Fiddle::Function.new(
  lib['GetTempPath2A'],
  [
    -Fiddle::TYPE_INT,  # BufferLength : DWORD
    Fiddle::TYPE_VOIDP,  # Buffer : LPSTR optional, out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetTempPath2A(
        BufferLength: u32,  // DWORD
        Buffer: *mut u8  // LPSTR optional, out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", CharSet = CharSet.Ansi)]
public static extern uint GetTempPath2A(uint BufferLength, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder Buffer);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetTempPath2A' -Namespace Win32 -PassThru
# $api::GetTempPath2A(BufferLength, Buffer)

#uselib "KERNEL32.dll"
#func global GetTempPath2A "GetTempPath2A" sptr, sptr
; GetTempPath2A BufferLength, varptr(Buffer)   ; 戻り値は stat
; BufferLength : DWORD -> "sptr"
; Buffer : LPSTR optional, out -> "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 "KERNEL32.dll"
#cfunc global GetTempPath2A "GetTempPath2A" int, var
; res = GetTempPath2A(BufferLength, Buffer)
; BufferLength : DWORD -> "int"
; Buffer : LPSTR optional, out -> "var"
; ※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。

; DWORD GetTempPath2A(DWORD BufferLength, LPSTR Buffer)
#uselib "KERNEL32.dll"
#cfunc global GetTempPath2A "GetTempPath2A" int, var
; res = GetTempPath2A(BufferLength, Buffer)
; BufferLength : DWORD -> "int"
; Buffer : LPSTR optional, out -> "var"
; ※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 (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procGetTempPath2A = kernel32.NewProc("GetTempPath2A")
)

// BufferLength (DWORD), Buffer (LPSTR optional, out)
r1, _, err := procGetTempPath2A.Call(
	uintptr(BufferLength),
	uintptr(Buffer),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function GetTempPath2A(
  BufferLength: DWORD;   // DWORD
  Buffer: PAnsiChar   // LPSTR optional, out
): DWORD; stdcall;
  external 'KERNEL32.dll' name 'GetTempPath2A';

result := DllCall("KERNEL32\GetTempPath2A"
    , "UInt", BufferLength   ; DWORD
    , "Ptr", Buffer   ; LPSTR optional, out
    , "UInt")   ; return: DWORD

●GetTempPath2A(BufferLength, Buffer) = DLL("KERNEL32.dll", "dword GetTempPath2A(dword, char*)")
# 呼び出し: GetTempPath2A(BufferLength, Buffer)
# BufferLength : DWORD -> "dword"
# Buffer : LPSTR optional, out -> "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)。