GetIconInfo

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

BOOL GetIconInfo(
    HICON hIcon,
    ICONINFO* piconinfo
);

<DllImport("USER32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetIconInfo(
    hIcon As IntPtr,   ' HICON
    piconinfo As IntPtr   ' ICONINFO* out
) As Boolean
End Function

' hIcon : HICON
' piconinfo : ICONINFO* out
Declare PtrSafe Function GetIconInfo Lib "user32" ( _
    ByVal hIcon As LongPtr, _
    ByVal piconinfo 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

GetIconInfo = ctypes.windll.user32.GetIconInfo
GetIconInfo.restype = wintypes.BOOL
GetIconInfo.argtypes = [
    wintypes.HANDLE,  # hIcon : HICON
    ctypes.c_void_p,  # piconinfo : ICONINFO* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
GetIconInfo = Fiddle::Function.new(
  lib['GetIconInfo'],
  [
    Fiddle::TYPE_VOIDP,  # hIcon : HICON
    Fiddle::TYPE_VOIDP,  # piconinfo : ICONINFO* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn GetIconInfo(
        hIcon: *mut core::ffi::c_void,  // HICON
        piconinfo: *mut ICONINFO  // ICONINFO* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", SetLastError = true)]
public static extern bool GetIconInfo(IntPtr hIcon, IntPtr piconinfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_GetIconInfo' -Namespace Win32 -PassThru
# $api::GetIconInfo(hIcon, piconinfo)

#uselib "USER32.dll"
#func global GetIconInfo "GetIconInfo" sptr, sptr
; GetIconInfo hIcon, varptr(piconinfo)   ; 戻り値は stat
; hIcon : HICON -> "sptr"
; piconinfo : ICONINFO* out -> "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 GetIconInfo "GetIconInfo" sptr, var
; res = GetIconInfo(hIcon, piconinfo)
; hIcon : HICON -> "sptr"
; piconinfo : ICONINFO* out -> "var"
; ※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 GetIconInfo(HICON hIcon, ICONINFO* piconinfo)
#uselib "USER32.dll"
#cfunc global GetIconInfo "GetIconInfo" intptr, var
; res = GetIconInfo(hIcon, piconinfo)
; hIcon : HICON -> "intptr"
; piconinfo : ICONINFO* out -> "var"
; ※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")
	procGetIconInfo = user32.NewProc("GetIconInfo")
)

// hIcon (HICON), piconinfo (ICONINFO* out)
r1, _, err := procGetIconInfo.Call(
	uintptr(hIcon),
	uintptr(piconinfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetIconInfo(
  hIcon: THandle;   // HICON
  piconinfo: Pointer   // ICONINFO* out
): BOOL; stdcall;
  external 'USER32.dll' name 'GetIconInfo';

result := DllCall("USER32\GetIconInfo"
    , "Ptr", hIcon   ; HICON
    , "Ptr", piconinfo   ; ICONINFO* out
    , "Int")   ; return: BOOL

●GetIconInfo(hIcon, piconinfo) = DLL("USER32.dll", "bool GetIconInfo(void*, void*)")
# 呼び出し: GetIconInfo(hIcon, piconinfo)
# hIcon : HICON -> "void*"
# piconinfo : ICONINFO* out -> "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)。