DAD_AutoScroll

// SHELL32.dll
#include <windows.h>

BOOL DAD_AutoScroll(
    HWND hwnd,
    AUTO_SCROLL_DATA* pad,
    const POINT* pptNow
);

<DllImport("SHELL32.dll", ExactSpelling:=True)>
Public Shared Function DAD_AutoScroll(
    hwnd As IntPtr,   ' HWND
    pad As IntPtr,   ' AUTO_SCROLL_DATA* in/out
    pptNow As IntPtr   ' POINT*
) As Boolean
End Function

' hwnd : HWND
' pad : AUTO_SCROLL_DATA* in/out
' pptNow : POINT*
Declare PtrSafe Function DAD_AutoScroll Lib "shell32" ( _
    ByVal hwnd As LongPtr, _
    ByVal pad As LongPtr, _
    ByVal pptNow 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

DAD_AutoScroll = ctypes.windll.shell32.DAD_AutoScroll
DAD_AutoScroll.restype = wintypes.BOOL
DAD_AutoScroll.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND
    ctypes.c_void_p,  # pad : AUTO_SCROLL_DATA* in/out
    ctypes.c_void_p,  # pptNow : POINT*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHELL32.dll')
DAD_AutoScroll = Fiddle::Function.new(
  lib['DAD_AutoScroll'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND
    Fiddle::TYPE_VOIDP,  # pad : AUTO_SCROLL_DATA* in/out
    Fiddle::TYPE_VOIDP,  # pptNow : POINT*
  ],
  Fiddle::TYPE_INT)

#[link(name = "shell32")]
extern "system" {
    fn DAD_AutoScroll(
        hwnd: *mut core::ffi::c_void,  // HWND
        pad: *mut AUTO_SCROLL_DATA,  // AUTO_SCROLL_DATA* in/out
        pptNow: *const POINT  // POINT*
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("SHELL32.dll")]
public static extern bool DAD_AutoScroll(IntPtr hwnd, IntPtr pad, IntPtr pptNow);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHELL32_DAD_AutoScroll' -Namespace Win32 -PassThru
# $api::DAD_AutoScroll(hwnd, pad, pptNow)

#uselib "SHELL32.dll"
#func global DAD_AutoScroll "DAD_AutoScroll" sptr, sptr, sptr
; DAD_AutoScroll hwnd, varptr(pad), varptr(pptNow)   ; 戻り値は stat
; hwnd : HWND -> "sptr"
; pad : AUTO_SCROLL_DATA* in/out -> "sptr"
; pptNow : POINT* -> "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 "SHELL32.dll"
#cfunc global DAD_AutoScroll "DAD_AutoScroll" sptr, var, var
; res = DAD_AutoScroll(hwnd, pad, pptNow)
; hwnd : HWND -> "sptr"
; pad : AUTO_SCROLL_DATA* in/out -> "var"
; pptNow : POINT* -> "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。

; BOOL DAD_AutoScroll(HWND hwnd, AUTO_SCROLL_DATA* pad, POINT* pptNow)
#uselib "SHELL32.dll"
#cfunc global DAD_AutoScroll "DAD_AutoScroll" intptr, var, var
; res = DAD_AutoScroll(hwnd, pad, pptNow)
; hwnd : HWND -> "intptr"
; pad : AUTO_SCROLL_DATA* in/out -> "var"
; pptNow : POINT* -> "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 (
	shell32 = windows.NewLazySystemDLL("SHELL32.dll")
	procDAD_AutoScroll = shell32.NewProc("DAD_AutoScroll")
)

// hwnd (HWND), pad (AUTO_SCROLL_DATA* in/out), pptNow (POINT*)
r1, _, err := procDAD_AutoScroll.Call(
	uintptr(hwnd),
	uintptr(pad),
	uintptr(pptNow),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function DAD_AutoScroll(
  hwnd: THandle;   // HWND
  pad: Pointer;   // AUTO_SCROLL_DATA* in/out
  pptNow: Pointer   // POINT*
): BOOL; stdcall;
  external 'SHELL32.dll' name 'DAD_AutoScroll';

result := DllCall("SHELL32\DAD_AutoScroll"
    , "Ptr", hwnd   ; HWND
    , "Ptr", pad   ; AUTO_SCROLL_DATA* in/out
    , "Ptr", pptNow   ; POINT*
    , "Int")   ; return: BOOL

●DAD_AutoScroll(hwnd, pad, pptNow) = DLL("SHELL32.dll", "bool DAD_AutoScroll(void*, void*, void*)")
# 呼び出し: DAD_AutoScroll(hwnd, pad, pptNow)
# hwnd : HWND -> "void*"
# pad : AUTO_SCROLL_DATA* in/out -> "void*"
# pptNow : POINT* -> "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)。