CountClipboardFormats

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

INT CountClipboardFormats(void);

<DllImport("USER32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CountClipboardFormats() As Integer
End Function

Declare PtrSafe Function CountClipboardFormats Lib "user32" () As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CountClipboardFormats = ctypes.windll.user32.CountClipboardFormats
CountClipboardFormats.restype = ctypes.c_int
CountClipboardFormats.argtypes = []
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
CountClipboardFormats = Fiddle::Function.new(
  lib['CountClipboardFormats'],
  [],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn CountClipboardFormats() -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", SetLastError = true)]
public static extern int CountClipboardFormats();
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_CountClipboardFormats' -Namespace Win32 -PassThru
# $api::CountClipboardFormats()

#uselib "USER32.dll"
#func global CountClipboardFormats "CountClipboardFormats"
; CountClipboardFormats   ; 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 "USER32.dll"
#cfunc global CountClipboardFormats "CountClipboardFormats"
; res = CountClipboardFormats()

; INT CountClipboardFormats()
#uselib "USER32.dll"
#cfunc global CountClipboardFormats "CountClipboardFormats"
; res = CountClipboardFormats()

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procCountClipboardFormats = user32.NewProc("CountClipboardFormats")
)

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

function CountClipboardFormats: Integer; stdcall;
  external 'USER32.dll' name 'CountClipboardFormats';

result := DllCall("USER32\CountClipboardFormats", "Int")

●CountClipboardFormats() = DLL("USER32.dll", "int CountClipboardFormats()")
# 呼び出し: CountClipboardFormats()
# 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)。