TextRange_GetText

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

HRESULT TextRange_GetText(
    HUIATEXTRANGE hobj,
    INT maxLength,
    LPWSTR* pRetVal
);

<DllImport("UIAutomationCore.dll", ExactSpelling:=True)>
Public Shared Function TextRange_GetText(
    hobj As IntPtr,   ' HUIATEXTRANGE
    maxLength As Integer,   ' INT
    pRetVal As IntPtr   ' LPWSTR* in/out
) As Integer
End Function

' hobj : HUIATEXTRANGE
' maxLength : INT
' pRetVal : LPWSTR* in/out
Declare PtrSafe Function TextRange_GetText Lib "uiautomationcore" ( _
    ByVal hobj As LongPtr, _
    ByVal maxLength As Long, _
    ByVal pRetVal 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

TextRange_GetText = ctypes.windll.uiautomationcore.TextRange_GetText
TextRange_GetText.restype = ctypes.c_int
TextRange_GetText.argtypes = [
    wintypes.HANDLE,  # hobj : HUIATEXTRANGE
    ctypes.c_int,  # maxLength : INT
    ctypes.c_void_p,  # pRetVal : LPWSTR* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('UIAutomationCore.dll')
TextRange_GetText = Fiddle::Function.new(
  lib['TextRange_GetText'],
  [
    Fiddle::TYPE_VOIDP,  # hobj : HUIATEXTRANGE
    Fiddle::TYPE_INT,  # maxLength : INT
    Fiddle::TYPE_VOIDP,  # pRetVal : LPWSTR* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "uiautomationcore")]
extern "system" {
    fn TextRange_GetText(
        hobj: *mut core::ffi::c_void,  // HUIATEXTRANGE
        maxLength: i32,  // INT
        pRetVal: *mut *mut u16  // LPWSTR* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("UIAutomationCore.dll")]
public static extern int TextRange_GetText(IntPtr hobj, int maxLength, IntPtr pRetVal);
"@
$api = Add-Type -MemberDefinition $sig -Name 'UIAutomationCore_TextRange_GetText' -Namespace Win32 -PassThru
# $api::TextRange_GetText(hobj, maxLength, pRetVal)

#uselib "UIAutomationCore.dll"
#func global TextRange_GetText "TextRange_GetText" sptr, sptr, sptr
; TextRange_GetText hobj, maxLength, varptr(pRetVal)   ; 戻り値は stat
; hobj : HUIATEXTRANGE -> "sptr"
; maxLength : INT -> "sptr"
; pRetVal : LPWSTR* in/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 "UIAutomationCore.dll"
#cfunc global TextRange_GetText "TextRange_GetText" sptr, int, var
; res = TextRange_GetText(hobj, maxLength, pRetVal)
; hobj : HUIATEXTRANGE -> "sptr"
; maxLength : INT -> "int"
; pRetVal : LPWSTR* in/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 TextRange_GetText(HUIATEXTRANGE hobj, INT maxLength, LPWSTR* pRetVal)
#uselib "UIAutomationCore.dll"
#cfunc global TextRange_GetText "TextRange_GetText" intptr, int, var
; res = TextRange_GetText(hobj, maxLength, pRetVal)
; hobj : HUIATEXTRANGE -> "intptr"
; maxLength : INT -> "int"
; pRetVal : LPWSTR* in/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 (
	uiautomationcore = windows.NewLazySystemDLL("UIAutomationCore.dll")
	procTextRange_GetText = uiautomationcore.NewProc("TextRange_GetText")
)

// hobj (HUIATEXTRANGE), maxLength (INT), pRetVal (LPWSTR* in/out)
r1, _, err := procTextRange_GetText.Call(
	uintptr(hobj),
	uintptr(maxLength),
	uintptr(pRetVal),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function TextRange_GetText(
  hobj: THandle;   // HUIATEXTRANGE
  maxLength: Integer;   // INT
  pRetVal: PPWideChar   // LPWSTR* in/out
): Integer; stdcall;
  external 'UIAutomationCore.dll' name 'TextRange_GetText';

result := DllCall("UIAutomationCore\TextRange_GetText"
    , "Ptr", hobj   ; HUIATEXTRANGE
    , "Int", maxLength   ; INT
    , "Ptr", pRetVal   ; LPWSTR* in/out
    , "Int")   ; return: HRESULT

●TextRange_GetText(hobj, maxLength, pRetVal) = DLL("UIAutomationCore.dll", "int TextRange_GetText(void*, int, void*)")
# 呼び出し: TextRange_GetText(hobj, maxLength, pRetVal)
# hobj : HUIATEXTRANGE -> "void*"
# maxLength : INT -> "int"
# pRetVal : LPWSTR* in/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)。