lstrcatA

// KERNEL32.dll  (ANSI / -A)
#include <windows.h>

LPSTR lstrcatA(
    LPSTR lpString1,
    LPCSTR lpString2
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function lstrcatA(
    <MarshalAs(UnmanagedType.LPStr)> lpString1 As System.Text.StringBuilder,   ' LPSTR in/out
    <MarshalAs(UnmanagedType.LPStr)> lpString2 As String   ' LPCSTR
) As IntPtr
End Function

' lpString1 : LPSTR in/out
' lpString2 : LPCSTR
Declare PtrSafe Function lstrcatA Lib "kernel32" ( _
    ByVal lpString1 As String, _
    ByVal lpString2 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

lstrcatA = ctypes.windll.kernel32.lstrcatA
lstrcatA.restype = wintypes.LPSTR
lstrcatA.argtypes = [
    wintypes.LPSTR,  # lpString1 : LPSTR in/out
    wintypes.LPCSTR,  # lpString2 : LPCSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
lstrcatA = Fiddle::Function.new(
  lib['lstrcatA'],
  [
    Fiddle::TYPE_VOIDP,  # lpString1 : LPSTR in/out
    Fiddle::TYPE_VOIDP,  # lpString2 : LPCSTR
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "kernel32")]
extern "system" {
    fn lstrcatA(
        lpString1: *mut u8,  // LPSTR in/out
        lpString2: *const u8  // LPCSTR
    ) -> *mut u8;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", CharSet = CharSet.Ansi)]
public static extern IntPtr lstrcatA([MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder lpString1, [MarshalAs(UnmanagedType.LPStr)] string lpString2);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_lstrcatA' -Namespace Win32 -PassThru
# $api::lstrcatA(lpString1, lpString2)

#uselib "KERNEL32.dll"
#func global lstrcatA "lstrcatA" sptr, sptr
; lstrcatA varptr(lpString1), lpString2   ; 戻り値は stat
; lpString1 : LPSTR in/out -> "sptr"
; lpString2 : 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 "KERNEL32.dll"
#cfunc global lstrcatA "lstrcatA" var, str
; res = lstrcatA(lpString1, lpString2)
; lpString1 : LPSTR in/out -> "var"
; lpString2 : LPCSTR -> "str"
; ※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。

; LPSTR lstrcatA(LPSTR lpString1, LPCSTR lpString2)
#uselib "KERNEL32.dll"
#cfunc global lstrcatA "lstrcatA" var, str
; res = lstrcatA(lpString1, lpString2)
; lpString1 : LPSTR in/out -> "var"
; lpString2 : LPCSTR -> "str"
; ※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 (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	proclstrcatA = kernel32.NewProc("lstrcatA")
)

// lpString1 (LPSTR in/out), lpString2 (LPCSTR)
r1, _, err := proclstrcatA.Call(
	uintptr(lpString1),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpString2))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // LPSTR

function lstrcatA(
  lpString1: PAnsiChar;   // LPSTR in/out
  lpString2: PAnsiChar   // LPCSTR
): PAnsiChar; stdcall;
  external 'KERNEL32.dll' name 'lstrcatA';

result := DllCall("KERNEL32\lstrcatA"
    , "Ptr", lpString1   ; LPSTR in/out
    , "AStr", lpString2   ; LPCSTR
    , "Ptr")   ; return: LPSTR

●lstrcatA(lpString1, lpString2) = DLL("KERNEL32.dll", "char* lstrcatA(char*, char*)")
# 呼び出し: lstrcatA(lpString1, lpString2)
# lpString1 : LPSTR in/out -> "char*"
# lpString2 : 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)。