StrStrIA

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

LPSTR StrStrIA(
    LPCSTR pszFirst,
    LPCSTR pszSrch
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function StrStrIA(
    <MarshalAs(UnmanagedType.LPStr)> pszFirst As String,   ' LPCSTR
    <MarshalAs(UnmanagedType.LPStr)> pszSrch As String   ' LPCSTR
) As IntPtr
End Function

' pszFirst : LPCSTR
' pszSrch : LPCSTR
Declare PtrSafe Function StrStrIA Lib "shlwapi" ( _
    ByVal pszFirst As String, _
    ByVal pszSrch As String) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

StrStrIA = ctypes.windll.shlwapi.StrStrIA
StrStrIA.restype = wintypes.LPSTR
StrStrIA.argtypes = [
    wintypes.LPCSTR,  # pszFirst : LPCSTR
    wintypes.LPCSTR,  # pszSrch : LPCSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
StrStrIA = Fiddle::Function.new(
  lib['StrStrIA'],
  [
    Fiddle::TYPE_VOIDP,  # pszFirst : LPCSTR
    Fiddle::TYPE_VOIDP,  # pszSrch : LPCSTR
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "shlwapi")]
extern "system" {
    fn StrStrIA(
        pszFirst: *const u8,  // LPCSTR
        pszSrch: *const u8  // LPCSTR
    ) -> *mut u8;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll", CharSet = CharSet.Ansi)]
public static extern IntPtr StrStrIA([MarshalAs(UnmanagedType.LPStr)] string pszFirst, [MarshalAs(UnmanagedType.LPStr)] string pszSrch);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_StrStrIA' -Namespace Win32 -PassThru
# $api::StrStrIA(pszFirst, pszSrch)

#uselib "SHLWAPI.dll"
#func global StrStrIA "StrStrIA" sptr, sptr
; StrStrIA pszFirst, pszSrch   ; 戻り値は stat
; pszFirst : LPCSTR -> "sptr"
; pszSrch : LPCSTR -> "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 "SHLWAPI.dll"
#cfunc global StrStrIA "StrStrIA" str, str
; res = StrStrIA(pszFirst, pszSrch)
; pszFirst : LPCSTR -> "str"
; pszSrch : LPCSTR -> "str"

; LPSTR StrStrIA(LPCSTR pszFirst, LPCSTR pszSrch)
#uselib "SHLWAPI.dll"
#cfunc global StrStrIA "StrStrIA" str, str
; res = StrStrIA(pszFirst, pszSrch)
; pszFirst : LPCSTR -> "str"
; pszSrch : LPCSTR -> "str"

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

var (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procStrStrIA = shlwapi.NewProc("StrStrIA")
)

// pszFirst (LPCSTR), pszSrch (LPCSTR)
r1, _, err := procStrStrIA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszFirst))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszSrch))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // LPSTR

function StrStrIA(
  pszFirst: PAnsiChar;   // LPCSTR
  pszSrch: PAnsiChar   // LPCSTR
): PAnsiChar; stdcall;
  external 'SHLWAPI.dll' name 'StrStrIA';

result := DllCall("SHLWAPI\StrStrIA"
    , "AStr", pszFirst   ; LPCSTR
    , "AStr", pszSrch   ; LPCSTR
    , "Ptr")   ; return: LPSTR

●StrStrIA(pszFirst, pszSrch) = DLL("SHLWAPI.dll", "char* StrStrIA(char*, char*)")
# 呼び出し: StrStrIA(pszFirst, pszSrch)
# pszFirst : LPCSTR -> "char*"
# pszSrch : LPCSTR -> "char*"
# 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)。