GetThemeStream

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

HRESULT GetThemeStream(
    HTHEME hTheme,
    INT iPartId,
    INT iStateId,
    INT iPropId,
    void** ppvStream,
    DWORD* pcbStream,   // optional
    HINSTANCE hInst   // optional
);

<DllImport("UXTHEME.dll", ExactSpelling:=True)>
Public Shared Function GetThemeStream(
    hTheme As IntPtr,   ' HTHEME
    iPartId As Integer,   ' INT
    iStateId As Integer,   ' INT
    iPropId As Integer,   ' INT
    ppvStream As IntPtr,   ' void** out
    pcbStream As IntPtr,   ' DWORD* optional, out
    hInst As IntPtr   ' HINSTANCE optional
) As Integer
End Function

' hTheme : HTHEME
' iPartId : INT
' iStateId : INT
' iPropId : INT
' ppvStream : void** out
' pcbStream : DWORD* optional, out
' hInst : HINSTANCE optional
Declare PtrSafe Function GetThemeStream Lib "uxtheme" ( _
    ByVal hTheme As LongPtr, _
    ByVal iPartId As Long, _
    ByVal iStateId As Long, _
    ByVal iPropId As Long, _
    ByVal ppvStream As LongPtr, _
    ByVal pcbStream As LongPtr, _
    ByVal hInst As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetThemeStream = ctypes.windll.uxtheme.GetThemeStream
GetThemeStream.restype = ctypes.c_int
GetThemeStream.argtypes = [
    ctypes.c_ssize_t,  # hTheme : HTHEME
    ctypes.c_int,  # iPartId : INT
    ctypes.c_int,  # iStateId : INT
    ctypes.c_int,  # iPropId : INT
    ctypes.c_void_p,  # ppvStream : void** out
    ctypes.POINTER(wintypes.DWORD),  # pcbStream : DWORD* optional, out
    wintypes.HANDLE,  # hInst : HINSTANCE optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('UXTHEME.dll')
GetThemeStream = Fiddle::Function.new(
  lib['GetThemeStream'],
  [
    Fiddle::TYPE_INTPTR_T,  # hTheme : HTHEME
    Fiddle::TYPE_INT,  # iPartId : INT
    Fiddle::TYPE_INT,  # iStateId : INT
    Fiddle::TYPE_INT,  # iPropId : INT
    Fiddle::TYPE_VOIDP,  # ppvStream : void** out
    Fiddle::TYPE_VOIDP,  # pcbStream : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # hInst : HINSTANCE optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "uxtheme")]
extern "system" {
    fn GetThemeStream(
        hTheme: isize,  // HTHEME
        iPartId: i32,  // INT
        iStateId: i32,  // INT
        iPropId: i32,  // INT
        ppvStream: *mut *mut (),  // void** out
        pcbStream: *mut u32,  // DWORD* optional, out
        hInst: *mut core::ffi::c_void  // HINSTANCE optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("UXTHEME.dll")]
public static extern int GetThemeStream(IntPtr hTheme, int iPartId, int iStateId, int iPropId, IntPtr ppvStream, IntPtr pcbStream, IntPtr hInst);
"@
$api = Add-Type -MemberDefinition $sig -Name 'UXTHEME_GetThemeStream' -Namespace Win32 -PassThru
# $api::GetThemeStream(hTheme, iPartId, iStateId, iPropId, ppvStream, pcbStream, hInst)

#uselib "UXTHEME.dll"
#func global GetThemeStream "GetThemeStream" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; GetThemeStream hTheme, iPartId, iStateId, iPropId, ppvStream, varptr(pcbStream), hInst   ; 戻り値は stat
; hTheme : HTHEME -> "sptr"
; iPartId : INT -> "sptr"
; iStateId : INT -> "sptr"
; iPropId : INT -> "sptr"
; ppvStream : void** out -> "sptr"
; pcbStream : DWORD* optional, out -> "sptr"
; hInst : HINSTANCE optional -> "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 GetThemeStream "GetThemeStream" sptr, int, int, int, sptr, var, sptr
; res = GetThemeStream(hTheme, iPartId, iStateId, iPropId, ppvStream, pcbStream, hInst)
; hTheme : HTHEME -> "sptr"
; iPartId : INT -> "int"
; iStateId : INT -> "int"
; iPropId : INT -> "int"
; ppvStream : void** out -> "sptr"
; pcbStream : DWORD* optional, out -> "var"
; hInst : HINSTANCE optional -> "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。

; HRESULT GetThemeStream(HTHEME hTheme, INT iPartId, INT iStateId, INT iPropId, void** ppvStream, DWORD* pcbStream, HINSTANCE hInst)
#uselib "UXTHEME.dll"
#cfunc global GetThemeStream "GetThemeStream" intptr, int, int, int, intptr, var, intptr
; res = GetThemeStream(hTheme, iPartId, iStateId, iPropId, ppvStream, pcbStream, hInst)
; hTheme : HTHEME -> "intptr"
; iPartId : INT -> "int"
; iStateId : INT -> "int"
; iPropId : INT -> "int"
; ppvStream : void** out -> "intptr"
; pcbStream : DWORD* optional, out -> "var"
; hInst : HINSTANCE optional -> "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 (
	uxtheme = windows.NewLazySystemDLL("UXTHEME.dll")
	procGetThemeStream = uxtheme.NewProc("GetThemeStream")
)

// hTheme (HTHEME), iPartId (INT), iStateId (INT), iPropId (INT), ppvStream (void** out), pcbStream (DWORD* optional, out), hInst (HINSTANCE optional)
r1, _, err := procGetThemeStream.Call(
	uintptr(hTheme),
	uintptr(iPartId),
	uintptr(iStateId),
	uintptr(iPropId),
	uintptr(ppvStream),
	uintptr(pcbStream),
	uintptr(hInst),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function GetThemeStream(
  hTheme: NativeInt;   // HTHEME
  iPartId: Integer;   // INT
  iStateId: Integer;   // INT
  iPropId: Integer;   // INT
  ppvStream: Pointer;   // void** out
  pcbStream: Pointer;   // DWORD* optional, out
  hInst: THandle   // HINSTANCE optional
): Integer; stdcall;
  external 'UXTHEME.dll' name 'GetThemeStream';

result := DllCall("UXTHEME\GetThemeStream"
    , "Ptr", hTheme   ; HTHEME
    , "Int", iPartId   ; INT
    , "Int", iStateId   ; INT
    , "Int", iPropId   ; INT
    , "Ptr", ppvStream   ; void** out
    , "Ptr", pcbStream   ; DWORD* optional, out
    , "Ptr", hInst   ; HINSTANCE optional
    , "Int")   ; return: HRESULT

●GetThemeStream(hTheme, iPartId, iStateId, iPropId, ppvStream, pcbStream, hInst) = DLL("UXTHEME.dll", "int GetThemeStream(int, int, int, int, void*, void*, void*)")
# 呼び出し: GetThemeStream(hTheme, iPartId, iStateId, iPropId, ppvStream, pcbStream, hInst)
# hTheme : HTHEME -> "int"
# iPartId : INT -> "int"
# iStateId : INT -> "int"
# iPropId : INT -> "int"
# ppvStream : void** out -> "void*"
# pcbStream : DWORD* optional, out -> "void*"
# hInst : HINSTANCE optional -> "void*"
# 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)。