AVIClearClipboard

// AVIFIL32.dll
#include <windows.h>

HRESULT AVIClearClipboard(void);

<DllImport("AVIFIL32.dll", ExactSpelling:=True)>
Public Shared Function AVIClearClipboard() As Integer
End Function

Declare PtrSafe Function AVIClearClipboard Lib "avifil32" () As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

AVIClearClipboard = ctypes.windll.avifil32.AVIClearClipboard
AVIClearClipboard.restype = ctypes.c_int
AVIClearClipboard.argtypes = []

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('AVIFIL32.dll')
AVIClearClipboard = Fiddle::Function.new(
  lib['AVIClearClipboard'],
  [],
  Fiddle::TYPE_INT)

#[link(name = "avifil32")]
extern "system" {
    fn AVIClearClipboard() -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("AVIFIL32.dll")]
public static extern int AVIClearClipboard();
"@
$api = Add-Type -MemberDefinition $sig -Name 'AVIFIL32_AVIClearClipboard' -Namespace Win32 -PassThru
# $api::AVIClearClipboard()

#uselib "AVIFIL32.dll"
#func global AVIClearClipboard "AVIClearClipboard"
; AVIClearClipboard   ; 戻り値は stat
; ※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 "AVIFIL32.dll"
#cfunc global AVIClearClipboard "AVIClearClipboard"
; res = AVIClearClipboard()

; HRESULT AVIClearClipboard()
#uselib "AVIFIL32.dll"
#cfunc global AVIClearClipboard "AVIClearClipboard"
; res = AVIClearClipboard()

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

var (
	avifil32 = windows.NewLazySystemDLL("AVIFIL32.dll")
	procAVIClearClipboard = avifil32.NewProc("AVIClearClipboard")
)

r1, _, err := procAVIClearClipboard.Call()
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function AVIClearClipboard: Integer; stdcall;
  external 'AVIFIL32.dll' name 'AVIClearClipboard';

result := DllCall("AVIFIL32\AVIClearClipboard", "Int")

●AVIClearClipboard() = DLL("AVIFIL32.dll", "int AVIClearClipboard()")
# 呼び出し: AVIClearClipboard()
# 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)。