GetClipboardFormatNameA

// USER32.dll  (ANSI / -A)
#include <windows.h>

INT GetClipboardFormatNameA(
    DWORD format,
    LPSTR lpszFormatName,
    INT cchMaxCount
);

<DllImport("USER32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetClipboardFormatNameA(
    format As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPStr)> lpszFormatName As System.Text.StringBuilder,   ' LPSTR out
    cchMaxCount As Integer   ' INT
) As Integer
End Function

' format : DWORD
' lpszFormatName : LPSTR out
' cchMaxCount : INT
Declare PtrSafe Function GetClipboardFormatNameA Lib "user32" ( _
    ByVal format As Long, _
    ByVal lpszFormatName As String, _
    ByVal cchMaxCount 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

GetClipboardFormatNameA = ctypes.windll.user32.GetClipboardFormatNameA
GetClipboardFormatNameA.restype = ctypes.c_int
GetClipboardFormatNameA.argtypes = [
    wintypes.DWORD,  # format : DWORD
    wintypes.LPSTR,  # lpszFormatName : LPSTR out
    ctypes.c_int,  # cchMaxCount : INT
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
GetClipboardFormatNameA = Fiddle::Function.new(
  lib['GetClipboardFormatNameA'],
  [
    -Fiddle::TYPE_INT,  # format : DWORD
    Fiddle::TYPE_VOIDP,  # lpszFormatName : LPSTR out
    Fiddle::TYPE_INT,  # cchMaxCount : INT
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn GetClipboardFormatNameA(
        format: u32,  // DWORD
        lpszFormatName: *mut u8,  // LPSTR out
        cchMaxCount: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern int GetClipboardFormatNameA(uint format, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder lpszFormatName, int cchMaxCount);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_GetClipboardFormatNameA' -Namespace Win32 -PassThru
# $api::GetClipboardFormatNameA(format, lpszFormatName, cchMaxCount)

#uselib "USER32.dll"
#func global GetClipboardFormatNameA "GetClipboardFormatNameA" sptr, sptr, sptr
; GetClipboardFormatNameA format, varptr(lpszFormatName), cchMaxCount   ; 戻り値は stat
; format : DWORD -> "sptr"
; lpszFormatName : LPSTR out -> "sptr"
; cchMaxCount : 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 GetClipboardFormatNameA "GetClipboardFormatNameA" int, var, int
; res = GetClipboardFormatNameA(format, lpszFormatName, cchMaxCount)
; format : DWORD -> "int"
; lpszFormatName : LPSTR out -> "var"
; cchMaxCount : 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。

; INT GetClipboardFormatNameA(DWORD format, LPSTR lpszFormatName, INT cchMaxCount)
#uselib "USER32.dll"
#cfunc global GetClipboardFormatNameA "GetClipboardFormatNameA" int, var, int
; res = GetClipboardFormatNameA(format, lpszFormatName, cchMaxCount)
; format : DWORD -> "int"
; lpszFormatName : LPSTR out -> "var"
; cchMaxCount : 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")
	procGetClipboardFormatNameA = user32.NewProc("GetClipboardFormatNameA")
)

// format (DWORD), lpszFormatName (LPSTR out), cchMaxCount (INT)
r1, _, err := procGetClipboardFormatNameA.Call(
	uintptr(format),
	uintptr(lpszFormatName),
	uintptr(cchMaxCount),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function GetClipboardFormatNameA(
  format: DWORD;   // DWORD
  lpszFormatName: PAnsiChar;   // LPSTR out
  cchMaxCount: Integer   // INT
): Integer; stdcall;
  external 'USER32.dll' name 'GetClipboardFormatNameA';

result := DllCall("USER32\GetClipboardFormatNameA"
    , "UInt", format   ; DWORD
    , "Ptr", lpszFormatName   ; LPSTR out
    , "Int", cchMaxCount   ; INT
    , "Int")   ; return: INT

●GetClipboardFormatNameA(format, lpszFormatName, cchMaxCount) = DLL("USER32.dll", "int GetClipboardFormatNameA(dword, char*, int)")
# 呼び出し: GetClipboardFormatNameA(format, lpszFormatName, cchMaxCount)
# format : DWORD -> "dword"
# lpszFormatName : LPSTR out -> "char*"
# cchMaxCount : 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)。