PathBuildRootA

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

LPSTR PathBuildRootA(
    LPSTR pszRoot,
    INT iDrive
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function PathBuildRootA(
    <MarshalAs(UnmanagedType.LPStr)> pszRoot As System.Text.StringBuilder,   ' LPSTR out
    iDrive As Integer   ' INT
) As IntPtr
End Function

' pszRoot : LPSTR out
' iDrive : INT
Declare PtrSafe Function PathBuildRootA Lib "shlwapi" ( _
    ByVal pszRoot As String, _
    ByVal iDrive As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

PathBuildRootA = ctypes.windll.shlwapi.PathBuildRootA
PathBuildRootA.restype = wintypes.LPSTR
PathBuildRootA.argtypes = [
    wintypes.LPSTR,  # pszRoot : LPSTR out
    ctypes.c_int,  # iDrive : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
PathBuildRootA = Fiddle::Function.new(
  lib['PathBuildRootA'],
  [
    Fiddle::TYPE_VOIDP,  # pszRoot : LPSTR out
    Fiddle::TYPE_INT,  # iDrive : INT
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "shlwapi")]
extern "system" {
    fn PathBuildRootA(
        pszRoot: *mut u8,  // LPSTR out
        iDrive: i32  // INT
    ) -> *mut u8;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll", CharSet = CharSet.Ansi)]
public static extern IntPtr PathBuildRootA([MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder pszRoot, int iDrive);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_PathBuildRootA' -Namespace Win32 -PassThru
# $api::PathBuildRootA(pszRoot, iDrive)

#uselib "SHLWAPI.dll"
#func global PathBuildRootA "PathBuildRootA" sptr, sptr
; PathBuildRootA varptr(pszRoot), iDrive   ; 戻り値は stat
; pszRoot : LPSTR out -> "sptr"
; iDrive : INT -> "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 "SHLWAPI.dll"
#cfunc global PathBuildRootA "PathBuildRootA" var, int
; res = PathBuildRootA(pszRoot, iDrive)
; pszRoot : LPSTR out -> "var"
; iDrive : INT -> "int"
; ※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 PathBuildRootA(LPSTR pszRoot, INT iDrive)
#uselib "SHLWAPI.dll"
#cfunc global PathBuildRootA "PathBuildRootA" var, int
; res = PathBuildRootA(pszRoot, iDrive)
; pszRoot : LPSTR out -> "var"
; iDrive : INT -> "int"
; ※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 (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procPathBuildRootA = shlwapi.NewProc("PathBuildRootA")
)

// pszRoot (LPSTR out), iDrive (INT)
r1, _, err := procPathBuildRootA.Call(
	uintptr(pszRoot),
	uintptr(iDrive),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // LPSTR

function PathBuildRootA(
  pszRoot: PAnsiChar;   // LPSTR out
  iDrive: Integer   // INT
): PAnsiChar; stdcall;
  external 'SHLWAPI.dll' name 'PathBuildRootA';

result := DllCall("SHLWAPI\PathBuildRootA"
    , "Ptr", pszRoot   ; LPSTR out
    , "Int", iDrive   ; INT
    , "Ptr")   ; return: LPSTR

●PathBuildRootA(pszRoot, iDrive) = DLL("SHLWAPI.dll", "char* PathBuildRootA(char*, int)")
# 呼び出し: PathBuildRootA(pszRoot, iDrive)
# pszRoot : LPSTR out -> "char*"
# iDrive : INT -> "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)。