GetBufferedPaintBits

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

HRESULT GetBufferedPaintBits(
    INT_PTR hBufferedPaint,
    RGBQUAD** ppbBuffer,
    INT* pcxRow
);

<DllImport("UXTHEME.dll", ExactSpelling:=True)>
Public Shared Function GetBufferedPaintBits(
    hBufferedPaint As IntPtr,   ' INT_PTR
    ppbBuffer As IntPtr,   ' RGBQUAD** out
    <Out> ByRef pcxRow As Integer   ' INT* out
) As Integer
End Function

' hBufferedPaint : INT_PTR
' ppbBuffer : RGBQUAD** out
' pcxRow : INT* out
Declare PtrSafe Function GetBufferedPaintBits Lib "uxtheme" ( _
    ByVal hBufferedPaint As LongPtr, _
    ByVal ppbBuffer As LongPtr, _
    ByRef pcxRow 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

GetBufferedPaintBits = ctypes.windll.uxtheme.GetBufferedPaintBits
GetBufferedPaintBits.restype = ctypes.c_int
GetBufferedPaintBits.argtypes = [
    ctypes.c_ssize_t,  # hBufferedPaint : INT_PTR
    ctypes.c_void_p,  # ppbBuffer : RGBQUAD** out
    ctypes.POINTER(ctypes.c_int),  # pcxRow : INT* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('UXTHEME.dll')
GetBufferedPaintBits = Fiddle::Function.new(
  lib['GetBufferedPaintBits'],
  [
    Fiddle::TYPE_INTPTR_T,  # hBufferedPaint : INT_PTR
    Fiddle::TYPE_VOIDP,  # ppbBuffer : RGBQUAD** out
    Fiddle::TYPE_VOIDP,  # pcxRow : INT* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "uxtheme")]
extern "system" {
    fn GetBufferedPaintBits(
        hBufferedPaint: isize,  // INT_PTR
        ppbBuffer: *mut *mut RGBQUAD,  // RGBQUAD** out
        pcxRow: *mut i32  // INT* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("UXTHEME.dll")]
public static extern int GetBufferedPaintBits(IntPtr hBufferedPaint, IntPtr ppbBuffer, out int pcxRow);
"@
$api = Add-Type -MemberDefinition $sig -Name 'UXTHEME_GetBufferedPaintBits' -Namespace Win32 -PassThru
# $api::GetBufferedPaintBits(hBufferedPaint, ppbBuffer, pcxRow)

#uselib "UXTHEME.dll"
#func global GetBufferedPaintBits "GetBufferedPaintBits" sptr, sptr, sptr
; GetBufferedPaintBits hBufferedPaint, varptr(ppbBuffer), varptr(pcxRow)   ; 戻り値は stat
; hBufferedPaint : INT_PTR -> "sptr"
; ppbBuffer : RGBQUAD** out -> "sptr"
; pcxRow : INT* out -> "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 GetBufferedPaintBits "GetBufferedPaintBits" sptr, var, var
; res = GetBufferedPaintBits(hBufferedPaint, ppbBuffer, pcxRow)
; hBufferedPaint : INT_PTR -> "sptr"
; ppbBuffer : RGBQUAD** out -> "var"
; pcxRow : INT* out -> "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 GetBufferedPaintBits(INT_PTR hBufferedPaint, RGBQUAD** ppbBuffer, INT* pcxRow)
#uselib "UXTHEME.dll"
#cfunc global GetBufferedPaintBits "GetBufferedPaintBits" intptr, var, var
; res = GetBufferedPaintBits(hBufferedPaint, ppbBuffer, pcxRow)
; hBufferedPaint : INT_PTR -> "intptr"
; ppbBuffer : RGBQUAD** out -> "var"
; pcxRow : INT* out -> "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")
	procGetBufferedPaintBits = uxtheme.NewProc("GetBufferedPaintBits")
)

// hBufferedPaint (INT_PTR), ppbBuffer (RGBQUAD** out), pcxRow (INT* out)
r1, _, err := procGetBufferedPaintBits.Call(
	uintptr(hBufferedPaint),
	uintptr(ppbBuffer),
	uintptr(pcxRow),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function GetBufferedPaintBits(
  hBufferedPaint: NativeInt;   // INT_PTR
  ppbBuffer: Pointer;   // RGBQUAD** out
  pcxRow: Pointer   // INT* out
): Integer; stdcall;
  external 'UXTHEME.dll' name 'GetBufferedPaintBits';

result := DllCall("UXTHEME\GetBufferedPaintBits"
    , "Ptr", hBufferedPaint   ; INT_PTR
    , "Ptr", ppbBuffer   ; RGBQUAD** out
    , "Ptr", pcxRow   ; INT* out
    , "Int")   ; return: HRESULT

●GetBufferedPaintBits(hBufferedPaint, ppbBuffer, pcxRow) = DLL("UXTHEME.dll", "int GetBufferedPaintBits(int, void*, void*)")
# 呼び出し: GetBufferedPaintBits(hBufferedPaint, ppbBuffer, pcxRow)
# hBufferedPaint : INT_PTR -> "int"
# ppbBuffer : RGBQUAD** out -> "void*"
# pcxRow : INT* out -> "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)。