GetThemeFilename

// UxTheme.dll
#include <windows.h>

HRESULT GetThemeFilename(
    HTHEME hTheme,
    INT iPartId,
    INT iStateId,
    INT iPropId,
    LPWSTR pszThemeFileName,
    INT cchMaxBuffChars
);

<DllImport("UxTheme.dll", ExactSpelling:=True)>
Public Shared Function GetThemeFilename(
    hTheme As IntPtr,   ' HTHEME
    iPartId As Integer,   ' INT
    iStateId As Integer,   ' INT
    iPropId As Integer,   ' INT
    <MarshalAs(UnmanagedType.LPWStr)> pszThemeFileName As System.Text.StringBuilder,   ' LPWSTR out
    cchMaxBuffChars As Integer   ' INT
) As Integer
End Function

' hTheme : HTHEME
' iPartId : INT
' iStateId : INT
' iPropId : INT
' pszThemeFileName : LPWSTR out
' cchMaxBuffChars : INT
Declare PtrSafe Function GetThemeFilename Lib "uxtheme" ( _
    ByVal hTheme As LongPtr, _
    ByVal iPartId As Long, _
    ByVal iStateId As Long, _
    ByVal iPropId As Long, _
    ByVal pszThemeFileName As LongPtr, _
    ByVal cchMaxBuffChars 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

GetThemeFilename = ctypes.windll.uxtheme.GetThemeFilename
GetThemeFilename.restype = ctypes.c_int
GetThemeFilename.argtypes = [
    ctypes.c_ssize_t,  # hTheme : HTHEME
    ctypes.c_int,  # iPartId : INT
    ctypes.c_int,  # iStateId : INT
    ctypes.c_int,  # iPropId : INT
    wintypes.LPWSTR,  # pszThemeFileName : LPWSTR out
    ctypes.c_int,  # cchMaxBuffChars : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('UxTheme.dll')
GetThemeFilename = Fiddle::Function.new(
  lib['GetThemeFilename'],
  [
    Fiddle::TYPE_INTPTR_T,  # hTheme : HTHEME
    Fiddle::TYPE_INT,  # iPartId : INT
    Fiddle::TYPE_INT,  # iStateId : INT
    Fiddle::TYPE_INT,  # iPropId : INT
    Fiddle::TYPE_VOIDP,  # pszThemeFileName : LPWSTR out
    Fiddle::TYPE_INT,  # cchMaxBuffChars : INT
  ],
  Fiddle::TYPE_INT)

#[link(name = "uxtheme")]
extern "system" {
    fn GetThemeFilename(
        hTheme: isize,  // HTHEME
        iPartId: i32,  // INT
        iStateId: i32,  // INT
        iPropId: i32,  // INT
        pszThemeFileName: *mut u16,  // LPWSTR out
        cchMaxBuffChars: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("UxTheme.dll")]
public static extern int GetThemeFilename(IntPtr hTheme, int iPartId, int iStateId, int iPropId, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszThemeFileName, int cchMaxBuffChars);
"@
$api = Add-Type -MemberDefinition $sig -Name 'UxTheme_GetThemeFilename' -Namespace Win32 -PassThru
# $api::GetThemeFilename(hTheme, iPartId, iStateId, iPropId, pszThemeFileName, cchMaxBuffChars)

#uselib "UxTheme.dll"
#func global GetThemeFilename "GetThemeFilename" sptr, sptr, sptr, sptr, sptr, sptr
; GetThemeFilename hTheme, iPartId, iStateId, iPropId, varptr(pszThemeFileName), cchMaxBuffChars   ; 戻り値は stat
; hTheme : HTHEME -> "sptr"
; iPartId : INT -> "sptr"
; iStateId : INT -> "sptr"
; iPropId : INT -> "sptr"
; pszThemeFileName : LPWSTR out -> "sptr"
; cchMaxBuffChars : 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 "UxTheme.dll"
#cfunc global GetThemeFilename "GetThemeFilename" sptr, int, int, int, var, int
; res = GetThemeFilename(hTheme, iPartId, iStateId, iPropId, pszThemeFileName, cchMaxBuffChars)
; hTheme : HTHEME -> "sptr"
; iPartId : INT -> "int"
; iStateId : INT -> "int"
; iPropId : INT -> "int"
; pszThemeFileName : LPWSTR out -> "var"
; cchMaxBuffChars : 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。

; HRESULT GetThemeFilename(HTHEME hTheme, INT iPartId, INT iStateId, INT iPropId, LPWSTR pszThemeFileName, INT cchMaxBuffChars)
#uselib "UxTheme.dll"
#cfunc global GetThemeFilename "GetThemeFilename" intptr, int, int, int, var, int
; res = GetThemeFilename(hTheme, iPartId, iStateId, iPropId, pszThemeFileName, cchMaxBuffChars)
; hTheme : HTHEME -> "intptr"
; iPartId : INT -> "int"
; iStateId : INT -> "int"
; iPropId : INT -> "int"
; pszThemeFileName : LPWSTR out -> "var"
; cchMaxBuffChars : 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 (
	uxtheme = windows.NewLazySystemDLL("UxTheme.dll")
	procGetThemeFilename = uxtheme.NewProc("GetThemeFilename")
)

// hTheme (HTHEME), iPartId (INT), iStateId (INT), iPropId (INT), pszThemeFileName (LPWSTR out), cchMaxBuffChars (INT)
r1, _, err := procGetThemeFilename.Call(
	uintptr(hTheme),
	uintptr(iPartId),
	uintptr(iStateId),
	uintptr(iPropId),
	uintptr(pszThemeFileName),
	uintptr(cchMaxBuffChars),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function GetThemeFilename(
  hTheme: NativeInt;   // HTHEME
  iPartId: Integer;   // INT
  iStateId: Integer;   // INT
  iPropId: Integer;   // INT
  pszThemeFileName: PWideChar;   // LPWSTR out
  cchMaxBuffChars: Integer   // INT
): Integer; stdcall;
  external 'UxTheme.dll' name 'GetThemeFilename';

result := DllCall("UxTheme\GetThemeFilename"
    , "Ptr", hTheme   ; HTHEME
    , "Int", iPartId   ; INT
    , "Int", iStateId   ; INT
    , "Int", iPropId   ; INT
    , "Ptr", pszThemeFileName   ; LPWSTR out
    , "Int", cchMaxBuffChars   ; INT
    , "Int")   ; return: HRESULT

●GetThemeFilename(hTheme, iPartId, iStateId, iPropId, pszThemeFileName, cchMaxBuffChars) = DLL("UxTheme.dll", "int GetThemeFilename(int, int, int, int, char*, int)")
# 呼び出し: GetThemeFilename(hTheme, iPartId, iStateId, iPropId, pszThemeFileName, cchMaxBuffChars)
# hTheme : HTHEME -> "int"
# iPartId : INT -> "int"
# iStateId : INT -> "int"
# iPropId : INT -> "int"
# pszThemeFileName : LPWSTR out -> "char*"
# cchMaxBuffChars : 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)。