DrawThemeParentBackgroundEx

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

HRESULT DrawThemeParentBackgroundEx(
    HWND hwnd,
    HDC hdc,
    DRAW_THEME_PARENT_BACKGROUND_FLAGS dwFlags,
    const RECT* prc   // optional
);

<DllImport("UxTheme.dll", ExactSpelling:=True)>
Public Shared Function DrawThemeParentBackgroundEx(
    hwnd As IntPtr,   ' HWND
    hdc As IntPtr,   ' HDC
    dwFlags As UInteger,   ' DRAW_THEME_PARENT_BACKGROUND_FLAGS
    prc As IntPtr   ' RECT* optional
) As Integer
End Function

' hwnd : HWND
' hdc : HDC
' dwFlags : DRAW_THEME_PARENT_BACKGROUND_FLAGS
' prc : RECT* optional
Declare PtrSafe Function DrawThemeParentBackgroundEx Lib "uxtheme" ( _
    ByVal hwnd As LongPtr, _
    ByVal hdc As LongPtr, _
    ByVal dwFlags As Long, _
    ByVal prc 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

DrawThemeParentBackgroundEx = ctypes.windll.uxtheme.DrawThemeParentBackgroundEx
DrawThemeParentBackgroundEx.restype = ctypes.c_int
DrawThemeParentBackgroundEx.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND
    wintypes.HANDLE,  # hdc : HDC
    wintypes.DWORD,  # dwFlags : DRAW_THEME_PARENT_BACKGROUND_FLAGS
    ctypes.c_void_p,  # prc : RECT* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('UxTheme.dll')
DrawThemeParentBackgroundEx = Fiddle::Function.new(
  lib['DrawThemeParentBackgroundEx'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    -Fiddle::TYPE_INT,  # dwFlags : DRAW_THEME_PARENT_BACKGROUND_FLAGS
    Fiddle::TYPE_VOIDP,  # prc : RECT* optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "uxtheme")]
extern "system" {
    fn DrawThemeParentBackgroundEx(
        hwnd: *mut core::ffi::c_void,  // HWND
        hdc: *mut core::ffi::c_void,  // HDC
        dwFlags: u32,  // DRAW_THEME_PARENT_BACKGROUND_FLAGS
        prc: *const RECT  // RECT* optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("UxTheme.dll")]
public static extern int DrawThemeParentBackgroundEx(IntPtr hwnd, IntPtr hdc, uint dwFlags, IntPtr prc);
"@
$api = Add-Type -MemberDefinition $sig -Name 'UxTheme_DrawThemeParentBackgroundEx' -Namespace Win32 -PassThru
# $api::DrawThemeParentBackgroundEx(hwnd, hdc, dwFlags, prc)

#uselib "UxTheme.dll"
#func global DrawThemeParentBackgroundEx "DrawThemeParentBackgroundEx" sptr, sptr, sptr, sptr
; DrawThemeParentBackgroundEx hwnd, hdc, dwFlags, varptr(prc)   ; 戻り値は stat
; hwnd : HWND -> "sptr"
; hdc : HDC -> "sptr"
; dwFlags : DRAW_THEME_PARENT_BACKGROUND_FLAGS -> "sptr"
; prc : RECT* 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 DrawThemeParentBackgroundEx "DrawThemeParentBackgroundEx" sptr, sptr, int, var
; res = DrawThemeParentBackgroundEx(hwnd, hdc, dwFlags, prc)
; hwnd : HWND -> "sptr"
; hdc : HDC -> "sptr"
; dwFlags : DRAW_THEME_PARENT_BACKGROUND_FLAGS -> "int"
; prc : RECT* optional -> "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。

; HRESULT DrawThemeParentBackgroundEx(HWND hwnd, HDC hdc, DRAW_THEME_PARENT_BACKGROUND_FLAGS dwFlags, RECT* prc)
#uselib "UxTheme.dll"
#cfunc global DrawThemeParentBackgroundEx "DrawThemeParentBackgroundEx" intptr, intptr, int, var
; res = DrawThemeParentBackgroundEx(hwnd, hdc, dwFlags, prc)
; hwnd : HWND -> "intptr"
; hdc : HDC -> "intptr"
; dwFlags : DRAW_THEME_PARENT_BACKGROUND_FLAGS -> "int"
; prc : RECT* optional -> "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 (
	uxtheme = windows.NewLazySystemDLL("UxTheme.dll")
	procDrawThemeParentBackgroundEx = uxtheme.NewProc("DrawThemeParentBackgroundEx")
)

// hwnd (HWND), hdc (HDC), dwFlags (DRAW_THEME_PARENT_BACKGROUND_FLAGS), prc (RECT* optional)
r1, _, err := procDrawThemeParentBackgroundEx.Call(
	uintptr(hwnd),
	uintptr(hdc),
	uintptr(dwFlags),
	uintptr(prc),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function DrawThemeParentBackgroundEx(
  hwnd: THandle;   // HWND
  hdc: THandle;   // HDC
  dwFlags: DWORD;   // DRAW_THEME_PARENT_BACKGROUND_FLAGS
  prc: Pointer   // RECT* optional
): Integer; stdcall;
  external 'UxTheme.dll' name 'DrawThemeParentBackgroundEx';

result := DllCall("UxTheme\DrawThemeParentBackgroundEx"
    , "Ptr", hwnd   ; HWND
    , "Ptr", hdc   ; HDC
    , "UInt", dwFlags   ; DRAW_THEME_PARENT_BACKGROUND_FLAGS
    , "Ptr", prc   ; RECT* optional
    , "Int")   ; return: HRESULT

●DrawThemeParentBackgroundEx(hwnd, hdc, dwFlags, prc) = DLL("UxTheme.dll", "int DrawThemeParentBackgroundEx(void*, void*, dword, void*)")
# 呼び出し: DrawThemeParentBackgroundEx(hwnd, hdc, dwFlags, prc)
# hwnd : HWND -> "void*"
# hdc : HDC -> "void*"
# dwFlags : DRAW_THEME_PARENT_BACKGROUND_FLAGS -> "dword"
# prc : RECT* 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)。