InvalidateRect

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

BOOL InvalidateRect(
    HWND hWnd,   // optional
    const RECT* lpRect,   // optional
    BOOL bErase
);

<DllImport("USER32.dll", ExactSpelling:=True)>
Public Shared Function InvalidateRect(
    hWnd As IntPtr,   ' HWND optional
    lpRect As IntPtr,   ' RECT* optional
    bErase As Boolean   ' BOOL
) As Boolean
End Function

' hWnd : HWND optional
' lpRect : RECT* optional
' bErase : BOOL
Declare PtrSafe Function InvalidateRect Lib "user32" ( _
    ByVal hWnd As LongPtr, _
    ByVal lpRect As LongPtr, _
    ByVal bErase 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

InvalidateRect = ctypes.windll.user32.InvalidateRect
InvalidateRect.restype = wintypes.BOOL
InvalidateRect.argtypes = [
    wintypes.HANDLE,  # hWnd : HWND optional
    ctypes.c_void_p,  # lpRect : RECT* optional
    wintypes.BOOL,  # bErase : BOOL
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
InvalidateRect = Fiddle::Function.new(
  lib['InvalidateRect'],
  [
    Fiddle::TYPE_VOIDP,  # hWnd : HWND optional
    Fiddle::TYPE_VOIDP,  # lpRect : RECT* optional
    Fiddle::TYPE_INT,  # bErase : BOOL
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll")]
public static extern bool InvalidateRect(IntPtr hWnd, IntPtr lpRect, bool bErase);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_InvalidateRect' -Namespace Win32 -PassThru
# $api::InvalidateRect(hWnd, lpRect, bErase)

#uselib "USER32.dll"
#func global InvalidateRect "InvalidateRect" sptr, sptr, sptr
; InvalidateRect hWnd, varptr(lpRect), bErase   ; 戻り値は stat
; hWnd : HWND optional -> "sptr"
; lpRect : RECT* optional -> "sptr"
; bErase : BOOL -> "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 InvalidateRect "InvalidateRect" sptr, var, int
; res = InvalidateRect(hWnd, lpRect, bErase)
; hWnd : HWND optional -> "sptr"
; lpRect : RECT* optional -> "var"
; bErase : BOOL -> "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。

; BOOL InvalidateRect(HWND hWnd, RECT* lpRect, BOOL bErase)
#uselib "USER32.dll"
#cfunc global InvalidateRect "InvalidateRect" intptr, var, int
; res = InvalidateRect(hWnd, lpRect, bErase)
; hWnd : HWND optional -> "intptr"
; lpRect : RECT* optional -> "var"
; bErase : BOOL -> "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")
	procInvalidateRect = user32.NewProc("InvalidateRect")
)

// hWnd (HWND optional), lpRect (RECT* optional), bErase (BOOL)
r1, _, err := procInvalidateRect.Call(
	uintptr(hWnd),
	uintptr(lpRect),
	uintptr(bErase),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function InvalidateRect(
  hWnd: THandle;   // HWND optional
  lpRect: Pointer;   // RECT* optional
  bErase: BOOL   // BOOL
): BOOL; stdcall;
  external 'USER32.dll' name 'InvalidateRect';

result := DllCall("USER32\InvalidateRect"
    , "Ptr", hWnd   ; HWND optional
    , "Ptr", lpRect   ; RECT* optional
    , "Int", bErase   ; BOOL
    , "Int")   ; return: BOOL

●InvalidateRect(hWnd, lpRect, bErase) = DLL("USER32.dll", "bool InvalidateRect(void*, void*, bool)")
# 呼び出し: InvalidateRect(hWnd, lpRect, bErase)
# hWnd : HWND optional -> "void*"
# lpRect : RECT* optional -> "void*"
# bErase : BOOL -> "bool"
# 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)。