ReleaseDC

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

INT ReleaseDC(
    HWND hWnd,   // optional
    HDC hDC
);

<DllImport("USER32.dll", ExactSpelling:=True)>
Public Shared Function ReleaseDC(
    hWnd As IntPtr,   ' HWND optional
    hDC As IntPtr   ' HDC
) As Integer
End Function

' hWnd : HWND optional
' hDC : HDC
Declare PtrSafe Function ReleaseDC Lib "user32" ( _
    ByVal hWnd As LongPtr, _
    ByVal hDC As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ReleaseDC = ctypes.windll.user32.ReleaseDC
ReleaseDC.restype = ctypes.c_int
ReleaseDC.argtypes = [
    wintypes.HANDLE,  # hWnd : HWND optional
    wintypes.HANDLE,  # hDC : HDC
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
ReleaseDC = Fiddle::Function.new(
  lib['ReleaseDC'],
  [
    Fiddle::TYPE_VOIDP,  # hWnd : HWND optional
    Fiddle::TYPE_VOIDP,  # hDC : HDC
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn ReleaseDC(
        hWnd: *mut core::ffi::c_void,  // HWND optional
        hDC: *mut core::ffi::c_void  // HDC
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll")]
public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_ReleaseDC' -Namespace Win32 -PassThru
# $api::ReleaseDC(hWnd, hDC)

#uselib "USER32.dll"
#func global ReleaseDC "ReleaseDC" sptr, sptr
; ReleaseDC hWnd, hDC   ; 戻り値は stat
; hWnd : HWND optional -> "sptr"
; hDC : HDC -> "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 ReleaseDC "ReleaseDC" sptr, sptr
; res = ReleaseDC(hWnd, hDC)
; hWnd : HWND optional -> "sptr"
; hDC : HDC -> "sptr"

; INT ReleaseDC(HWND hWnd, HDC hDC)
#uselib "USER32.dll"
#cfunc global ReleaseDC "ReleaseDC" intptr, intptr
; res = ReleaseDC(hWnd, hDC)
; hWnd : HWND optional -> "intptr"
; hDC : HDC -> "intptr"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procReleaseDC = user32.NewProc("ReleaseDC")
)

// hWnd (HWND optional), hDC (HDC)
r1, _, err := procReleaseDC.Call(
	uintptr(hWnd),
	uintptr(hDC),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function ReleaseDC(
  hWnd: THandle;   // HWND optional
  hDC: THandle   // HDC
): Integer; stdcall;
  external 'USER32.dll' name 'ReleaseDC';

result := DllCall("USER32\ReleaseDC"
    , "Ptr", hWnd   ; HWND optional
    , "Ptr", hDC   ; HDC
    , "Int")   ; return: INT

●ReleaseDC(hWnd, hDC) = DLL("USER32.dll", "int ReleaseDC(void*, void*)")
# 呼び出し: ReleaseDC(hWnd, hDC)
# hWnd : HWND optional -> "void*"
# hDC : HDC -> "void*"
# 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)。