SendInput

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

DWORD SendInput(
    DWORD cInputs,
    INPUT* pInputs,
    INT cbSize
);

<DllImport("USER32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SendInput(
    cInputs As UInteger,   ' DWORD
    pInputs As IntPtr,   ' INPUT*
    cbSize As Integer   ' INT
) As UInteger
End Function

' cInputs : DWORD
' pInputs : INPUT*
' cbSize : INT
Declare PtrSafe Function SendInput Lib "user32" ( _
    ByVal cInputs As Long, _
    ByVal pInputs As LongPtr, _
    ByVal cbSize 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

SendInput = ctypes.windll.user32.SendInput
SendInput.restype = wintypes.DWORD
SendInput.argtypes = [
    wintypes.DWORD,  # cInputs : DWORD
    ctypes.c_void_p,  # pInputs : INPUT*
    ctypes.c_int,  # cbSize : INT
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
SendInput = Fiddle::Function.new(
  lib['SendInput'],
  [
    -Fiddle::TYPE_INT,  # cInputs : DWORD
    Fiddle::TYPE_VOIDP,  # pInputs : INPUT*
    Fiddle::TYPE_INT,  # cbSize : INT
  ],
  -Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn SendInput(
        cInputs: u32,  // DWORD
        pInputs: *mut INPUT,  // INPUT*
        cbSize: i32  // INT
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", SetLastError = true)]
public static extern uint SendInput(uint cInputs, IntPtr pInputs, int cbSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_SendInput' -Namespace Win32 -PassThru
# $api::SendInput(cInputs, pInputs, cbSize)

#uselib "USER32.dll"
#func global SendInput "SendInput" sptr, sptr, sptr
; SendInput cInputs, varptr(pInputs), cbSize   ; 戻り値は stat
; cInputs : DWORD -> "sptr"
; pInputs : INPUT* -> "sptr"
; cbSize : INT -> "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 SendInput "SendInput" int, var, int
; res = SendInput(cInputs, pInputs, cbSize)
; cInputs : DWORD -> "int"
; pInputs : INPUT* -> "var"
; cbSize : INT -> "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。

; DWORD SendInput(DWORD cInputs, INPUT* pInputs, INT cbSize)
#uselib "USER32.dll"
#cfunc global SendInput "SendInput" int, var, int
; res = SendInput(cInputs, pInputs, cbSize)
; cInputs : DWORD -> "int"
; pInputs : INPUT* -> "var"
; cbSize : INT -> "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")
	procSendInput = user32.NewProc("SendInput")
)

// cInputs (DWORD), pInputs (INPUT*), cbSize (INT)
r1, _, err := procSendInput.Call(
	uintptr(cInputs),
	uintptr(pInputs),
	uintptr(cbSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function SendInput(
  cInputs: DWORD;   // DWORD
  pInputs: Pointer;   // INPUT*
  cbSize: Integer   // INT
): DWORD; stdcall;
  external 'USER32.dll' name 'SendInput';

result := DllCall("USER32\SendInput"
    , "UInt", cInputs   ; DWORD
    , "Ptr", pInputs   ; INPUT*
    , "Int", cbSize   ; INT
    , "UInt")   ; return: DWORD

●SendInput(cInputs, pInputs, cbSize) = DLL("USER32.dll", "dword SendInput(dword, void*, int)")
# 呼び出し: SendInput(cInputs, pInputs, cbSize)
# cInputs : DWORD -> "dword"
# pInputs : INPUT* -> "void*"
# cbSize : INT -> "int"
# 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)。