keybd_event

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

void keybd_event(
    BYTE bVk,
    BYTE bScan,
    KEYBD_EVENT_FLAGS dwFlags,
    UINT_PTR dwExtraInfo
);

<DllImport("USER32.dll", ExactSpelling:=True)>
Public Shared Sub keybd_event(
    bVk As Byte,   ' BYTE
    bScan As Byte,   ' BYTE
    dwFlags As UInteger,   ' KEYBD_EVENT_FLAGS
    dwExtraInfo As UIntPtr   ' UINT_PTR
)
End Sub

' bVk : BYTE
' bScan : BYTE
' dwFlags : KEYBD_EVENT_FLAGS
' dwExtraInfo : UINT_PTR
Declare PtrSafe Sub keybd_event Lib "user32" ( _
    ByVal bVk As Byte, _
    ByVal bScan As Byte, _
    ByVal dwFlags As Long, _
    ByVal dwExtraInfo As LongPtr)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

keybd_event = ctypes.windll.user32.keybd_event
keybd_event.restype = None
keybd_event.argtypes = [
    ctypes.c_ubyte,  # bVk : BYTE
    ctypes.c_ubyte,  # bScan : BYTE
    wintypes.DWORD,  # dwFlags : KEYBD_EVENT_FLAGS
    ctypes.c_size_t,  # dwExtraInfo : UINT_PTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
keybd_event = Fiddle::Function.new(
  lib['keybd_event'],
  [
    -Fiddle::TYPE_CHAR,  # bVk : BYTE
    -Fiddle::TYPE_CHAR,  # bScan : BYTE
    -Fiddle::TYPE_INT,  # dwFlags : KEYBD_EVENT_FLAGS
    Fiddle::TYPE_UINTPTR_T,  # dwExtraInfo : UINT_PTR
  ],
  Fiddle::TYPE_VOID)

#[link(name = "user32")]
extern "system" {
    fn keybd_event(
        bVk: u8,  // BYTE
        bScan: u8,  // BYTE
        dwFlags: u32,  // KEYBD_EVENT_FLAGS
        dwExtraInfo: usize  // UINT_PTR
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll")]
public static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, UIntPtr dwExtraInfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_keybd_event' -Namespace Win32 -PassThru
# $api::keybd_event(bVk, bScan, dwFlags, dwExtraInfo)

#uselib "USER32.dll"
#func global keybd_event "keybd_event" sptr, sptr, sptr, sptr
; keybd_event bVk, bScan, dwFlags, dwExtraInfo
; bVk : BYTE -> "sptr"
; bScan : BYTE -> "sptr"
; dwFlags : KEYBD_EVENT_FLAGS -> "sptr"
; dwExtraInfo : UINT_PTR -> "sptr"

#uselib "USER32.dll"
#func global keybd_event "keybd_event" int, int, int, sptr
; keybd_event bVk, bScan, dwFlags, dwExtraInfo
; bVk : BYTE -> "int"
; bScan : BYTE -> "int"
; dwFlags : KEYBD_EVENT_FLAGS -> "int"
; dwExtraInfo : UINT_PTR -> "sptr"

; void keybd_event(BYTE bVk, BYTE bScan, KEYBD_EVENT_FLAGS dwFlags, UINT_PTR dwExtraInfo)
#uselib "USER32.dll"
#func global keybd_event "keybd_event" int, int, int, intptr
; keybd_event bVk, bScan, dwFlags, dwExtraInfo
; bVk : BYTE -> "int"
; bScan : BYTE -> "int"
; dwFlags : KEYBD_EVENT_FLAGS -> "int"
; dwExtraInfo : UINT_PTR -> "intptr"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	prockeybd_event = user32.NewProc("keybd_event")
)

// bVk (BYTE), bScan (BYTE), dwFlags (KEYBD_EVENT_FLAGS), dwExtraInfo (UINT_PTR)
r1, _, err := prockeybd_event.Call(
	uintptr(bVk),
	uintptr(bScan),
	uintptr(dwFlags),
	uintptr(dwExtraInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure keybd_event(
  bVk: Byte;   // BYTE
  bScan: Byte;   // BYTE
  dwFlags: DWORD;   // KEYBD_EVENT_FLAGS
  dwExtraInfo: NativeUInt   // UINT_PTR
); stdcall;
  external 'USER32.dll' name 'keybd_event';

result := DllCall("USER32\keybd_event"
    , "UChar", bVk   ; BYTE
    , "UChar", bScan   ; BYTE
    , "UInt", dwFlags   ; KEYBD_EVENT_FLAGS
    , "UPtr", dwExtraInfo   ; UINT_PTR
    , "Int")   ; return: void

●keybd_event(bVk, bScan, dwFlags, dwExtraInfo) = DLL("USER32.dll", "int keybd_event(byte, byte, dword, int)")
# 呼び出し: keybd_event(bVk, bScan, dwFlags, dwExtraInfo)
# bVk : BYTE -> "byte"
# bScan : BYTE -> "byte"
# dwFlags : KEYBD_EVENT_FLAGS -> "dword"
# dwExtraInfo : UINT_PTR -> "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)。