MapWindowPoints

// USER32.dll
#include <windows.h>

INT MapWindowPoints(
    HWND hWndFrom,   // optional
    HWND hWndTo,   // optional
    POINT* lpPoints,
    DWORD cPoints
);

<DllImport("USER32.dll", ExactSpelling:=True)>
Public Shared Function MapWindowPoints(
    hWndFrom As IntPtr,   ' HWND optional
    hWndTo As IntPtr,   ' HWND optional
    lpPoints As IntPtr,   ' POINT* in/out
    cPoints As UInteger   ' DWORD
) As Integer
End Function

' hWndFrom : HWND optional
' hWndTo : HWND optional
' lpPoints : POINT* in/out
' cPoints : DWORD
Declare PtrSafe Function MapWindowPoints Lib "user32" ( _
    ByVal hWndFrom As LongPtr, _
    ByVal hWndTo As LongPtr, _
    ByVal lpPoints As LongPtr, _
    ByVal cPoints 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

MapWindowPoints = ctypes.windll.user32.MapWindowPoints
MapWindowPoints.restype = ctypes.c_int
MapWindowPoints.argtypes = [
    wintypes.HANDLE,  # hWndFrom : HWND optional
    wintypes.HANDLE,  # hWndTo : HWND optional
    ctypes.c_void_p,  # lpPoints : POINT* in/out
    wintypes.DWORD,  # cPoints : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
MapWindowPoints = Fiddle::Function.new(
  lib['MapWindowPoints'],
  [
    Fiddle::TYPE_VOIDP,  # hWndFrom : HWND optional
    Fiddle::TYPE_VOIDP,  # hWndTo : HWND optional
    Fiddle::TYPE_VOIDP,  # lpPoints : POINT* in/out
    -Fiddle::TYPE_INT,  # cPoints : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn MapWindowPoints(
        hWndFrom: *mut core::ffi::c_void,  // HWND optional
        hWndTo: *mut core::ffi::c_void,  // HWND optional
        lpPoints: *mut POINT,  // POINT* in/out
        cPoints: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll")]
public static extern int MapWindowPoints(IntPtr hWndFrom, IntPtr hWndTo, IntPtr lpPoints, uint cPoints);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_MapWindowPoints' -Namespace Win32 -PassThru
# $api::MapWindowPoints(hWndFrom, hWndTo, lpPoints, cPoints)

#uselib "USER32.dll"
#func global MapWindowPoints "MapWindowPoints" sptr, sptr, sptr, sptr
; MapWindowPoints hWndFrom, hWndTo, varptr(lpPoints), cPoints   ; 戻り値は stat
; hWndFrom : HWND optional -> "sptr"
; hWndTo : HWND optional -> "sptr"
; lpPoints : POINT* in/out -> "sptr"
; cPoints : DWORD -> "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 "USER32.dll"
#cfunc global MapWindowPoints "MapWindowPoints" sptr, sptr, var, int
; res = MapWindowPoints(hWndFrom, hWndTo, lpPoints, cPoints)
; hWndFrom : HWND optional -> "sptr"
; hWndTo : HWND optional -> "sptr"
; lpPoints : POINT* in/out -> "var"
; cPoints : DWORD -> "int"
; ※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。

; INT MapWindowPoints(HWND hWndFrom, HWND hWndTo, POINT* lpPoints, DWORD cPoints)
#uselib "USER32.dll"
#cfunc global MapWindowPoints "MapWindowPoints" intptr, intptr, var, int
; res = MapWindowPoints(hWndFrom, hWndTo, lpPoints, cPoints)
; hWndFrom : HWND optional -> "intptr"
; hWndTo : HWND optional -> "intptr"
; lpPoints : POINT* in/out -> "var"
; cPoints : DWORD -> "int"
; ※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 (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procMapWindowPoints = user32.NewProc("MapWindowPoints")
)

// hWndFrom (HWND optional), hWndTo (HWND optional), lpPoints (POINT* in/out), cPoints (DWORD)
r1, _, err := procMapWindowPoints.Call(
	uintptr(hWndFrom),
	uintptr(hWndTo),
	uintptr(lpPoints),
	uintptr(cPoints),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function MapWindowPoints(
  hWndFrom: THandle;   // HWND optional
  hWndTo: THandle;   // HWND optional
  lpPoints: Pointer;   // POINT* in/out
  cPoints: DWORD   // DWORD
): Integer; stdcall;
  external 'USER32.dll' name 'MapWindowPoints';

result := DllCall("USER32\MapWindowPoints"
    , "Ptr", hWndFrom   ; HWND optional
    , "Ptr", hWndTo   ; HWND optional
    , "Ptr", lpPoints   ; POINT* in/out
    , "UInt", cPoints   ; DWORD
    , "Int")   ; return: INT

●MapWindowPoints(hWndFrom, hWndTo, lpPoints, cPoints) = DLL("USER32.dll", "int MapWindowPoints(void*, void*, void*, dword)")
# 呼び出し: MapWindowPoints(hWndFrom, hWndTo, lpPoints, cPoints)
# hWndFrom : HWND optional -> "void*"
# hWndTo : HWND optional -> "void*"
# lpPoints : POINT* in/out -> "void*"
# cPoints : DWORD -> "dword"
# 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)。