DlgDirSelectComboBoxExA

// USER32.dll  (ANSI / -A)
#include <windows.h>

BOOL DlgDirSelectComboBoxExA(
    HWND hwndDlg,
    LPSTR lpString,
    INT cchOut,
    INT idComboBox
);

<DllImport("USER32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function DlgDirSelectComboBoxExA(
    hwndDlg As IntPtr,   ' HWND
    <MarshalAs(UnmanagedType.LPStr)> lpString As System.Text.StringBuilder,   ' LPSTR out
    cchOut As Integer,   ' INT
    idComboBox As Integer   ' INT
) As Boolean
End Function

' hwndDlg : HWND
' lpString : LPSTR out
' cchOut : INT
' idComboBox : INT
Declare PtrSafe Function DlgDirSelectComboBoxExA Lib "user32" ( _
    ByVal hwndDlg As LongPtr, _
    ByVal lpString As String, _
    ByVal cchOut As Long, _
    ByVal idComboBox As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

DlgDirSelectComboBoxExA = ctypes.windll.user32.DlgDirSelectComboBoxExA
DlgDirSelectComboBoxExA.restype = wintypes.BOOL
DlgDirSelectComboBoxExA.argtypes = [
    wintypes.HANDLE,  # hwndDlg : HWND
    wintypes.LPSTR,  # lpString : LPSTR out
    ctypes.c_int,  # cchOut : INT
    ctypes.c_int,  # idComboBox : INT
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
DlgDirSelectComboBoxExA = Fiddle::Function.new(
  lib['DlgDirSelectComboBoxExA'],
  [
    Fiddle::TYPE_VOIDP,  # hwndDlg : HWND
    Fiddle::TYPE_VOIDP,  # lpString : LPSTR out
    Fiddle::TYPE_INT,  # cchOut : INT
    Fiddle::TYPE_INT,  # idComboBox : INT
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn DlgDirSelectComboBoxExA(
        hwndDlg: *mut core::ffi::c_void,  // HWND
        lpString: *mut u8,  // LPSTR out
        cchOut: i32,  // INT
        idComboBox: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern bool DlgDirSelectComboBoxExA(IntPtr hwndDlg, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder lpString, int cchOut, int idComboBox);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_DlgDirSelectComboBoxExA' -Namespace Win32 -PassThru
# $api::DlgDirSelectComboBoxExA(hwndDlg, lpString, cchOut, idComboBox)

#uselib "USER32.dll"
#func global DlgDirSelectComboBoxExA "DlgDirSelectComboBoxExA" sptr, sptr, sptr, sptr
; DlgDirSelectComboBoxExA hwndDlg, varptr(lpString), cchOut, idComboBox   ; 戻り値は stat
; hwndDlg : HWND -> "sptr"
; lpString : LPSTR out -> "sptr"
; cchOut : INT -> "sptr"
; idComboBox : 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 "USER32.dll"
#cfunc global DlgDirSelectComboBoxExA "DlgDirSelectComboBoxExA" sptr, var, int, int
; res = DlgDirSelectComboBoxExA(hwndDlg, lpString, cchOut, idComboBox)
; hwndDlg : HWND -> "sptr"
; lpString : LPSTR out -> "var"
; cchOut : INT -> "int"
; idComboBox : 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。

; BOOL DlgDirSelectComboBoxExA(HWND hwndDlg, LPSTR lpString, INT cchOut, INT idComboBox)
#uselib "USER32.dll"
#cfunc global DlgDirSelectComboBoxExA "DlgDirSelectComboBoxExA" intptr, var, int, int
; res = DlgDirSelectComboBoxExA(hwndDlg, lpString, cchOut, idComboBox)
; hwndDlg : HWND -> "intptr"
; lpString : LPSTR out -> "var"
; cchOut : INT -> "int"
; idComboBox : 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 (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procDlgDirSelectComboBoxExA = user32.NewProc("DlgDirSelectComboBoxExA")
)

// hwndDlg (HWND), lpString (LPSTR out), cchOut (INT), idComboBox (INT)
r1, _, err := procDlgDirSelectComboBoxExA.Call(
	uintptr(hwndDlg),
	uintptr(lpString),
	uintptr(cchOut),
	uintptr(idComboBox),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function DlgDirSelectComboBoxExA(
  hwndDlg: THandle;   // HWND
  lpString: PAnsiChar;   // LPSTR out
  cchOut: Integer;   // INT
  idComboBox: Integer   // INT
): BOOL; stdcall;
  external 'USER32.dll' name 'DlgDirSelectComboBoxExA';

result := DllCall("USER32\DlgDirSelectComboBoxExA"
    , "Ptr", hwndDlg   ; HWND
    , "Ptr", lpString   ; LPSTR out
    , "Int", cchOut   ; INT
    , "Int", idComboBox   ; INT
    , "Int")   ; return: BOOL

●DlgDirSelectComboBoxExA(hwndDlg, lpString, cchOut, idComboBox) = DLL("USER32.dll", "bool DlgDirSelectComboBoxExA(void*, char*, int, int)")
# 呼び出し: DlgDirSelectComboBoxExA(hwndDlg, lpString, cchOut, idComboBox)
# hwndDlg : HWND -> "void*"
# lpString : LPSTR out -> "char*"
# cchOut : INT -> "int"
# idComboBox : 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)。