SHGetIconOverlayIndexA

// SHELL32.dll  (ANSI / -A)
#include <windows.h>

INT SHGetIconOverlayIndexA(
    LPCSTR pszIconPath,   // optional
    INT iIconIndex
);

<DllImport("SHELL32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SHGetIconOverlayIndexA(
    <MarshalAs(UnmanagedType.LPStr)> pszIconPath As String,   ' LPCSTR optional
    iIconIndex As Integer   ' INT
) As Integer
End Function

' pszIconPath : LPCSTR optional
' iIconIndex : INT
Declare PtrSafe Function SHGetIconOverlayIndexA Lib "shell32" ( _
    ByVal pszIconPath As String, _
    ByVal iIconIndex 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

SHGetIconOverlayIndexA = ctypes.windll.shell32.SHGetIconOverlayIndexA
SHGetIconOverlayIndexA.restype = ctypes.c_int
SHGetIconOverlayIndexA.argtypes = [
    wintypes.LPCSTR,  # pszIconPath : LPCSTR optional
    ctypes.c_int,  # iIconIndex : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHELL32.dll')
SHGetIconOverlayIndexA = Fiddle::Function.new(
  lib['SHGetIconOverlayIndexA'],
  [
    Fiddle::TYPE_VOIDP,  # pszIconPath : LPCSTR optional
    Fiddle::TYPE_INT,  # iIconIndex : INT
  ],
  Fiddle::TYPE_INT)

#[link(name = "shell32")]
extern "system" {
    fn SHGetIconOverlayIndexA(
        pszIconPath: *const u8,  // LPCSTR optional
        iIconIndex: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHELL32.dll", CharSet = CharSet.Ansi)]
public static extern int SHGetIconOverlayIndexA([MarshalAs(UnmanagedType.LPStr)] string pszIconPath, int iIconIndex);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHELL32_SHGetIconOverlayIndexA' -Namespace Win32 -PassThru
# $api::SHGetIconOverlayIndexA(pszIconPath, iIconIndex)

#uselib "SHELL32.dll"
#func global SHGetIconOverlayIndexA "SHGetIconOverlayIndexA" sptr, sptr
; SHGetIconOverlayIndexA pszIconPath, iIconIndex   ; 戻り値は stat
; pszIconPath : LPCSTR optional -> "sptr"
; iIconIndex : 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 "SHELL32.dll"
#cfunc global SHGetIconOverlayIndexA "SHGetIconOverlayIndexA" str, int
; res = SHGetIconOverlayIndexA(pszIconPath, iIconIndex)
; pszIconPath : LPCSTR optional -> "str"
; iIconIndex : INT -> "int"

; INT SHGetIconOverlayIndexA(LPCSTR pszIconPath, INT iIconIndex)
#uselib "SHELL32.dll"
#cfunc global SHGetIconOverlayIndexA "SHGetIconOverlayIndexA" str, int
; res = SHGetIconOverlayIndexA(pszIconPath, iIconIndex)
; pszIconPath : LPCSTR optional -> "str"
; iIconIndex : INT -> "int"

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

var (
	shell32 = windows.NewLazySystemDLL("SHELL32.dll")
	procSHGetIconOverlayIndexA = shell32.NewProc("SHGetIconOverlayIndexA")
)

// pszIconPath (LPCSTR optional), iIconIndex (INT)
r1, _, err := procSHGetIconOverlayIndexA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszIconPath))),
	uintptr(iIconIndex),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SHGetIconOverlayIndexA(
  pszIconPath: PAnsiChar;   // LPCSTR optional
  iIconIndex: Integer   // INT
): Integer; stdcall;
  external 'SHELL32.dll' name 'SHGetIconOverlayIndexA';

result := DllCall("SHELL32\SHGetIconOverlayIndexA"
    , "AStr", pszIconPath   ; LPCSTR optional
    , "Int", iIconIndex   ; INT
    , "Int")   ; return: INT

●SHGetIconOverlayIndexA(pszIconPath, iIconIndex) = DLL("SHELL32.dll", "int SHGetIconOverlayIndexA(char*, int)")
# 呼び出し: SHGetIconOverlayIndexA(pszIconPath, iIconIndex)
# pszIconPath : LPCSTR optional -> "char*"
# iIconIndex : 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)。