CreateSymbolicLinkA

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

BOOLEAN CreateSymbolicLinkA(
    LPCSTR lpSymlinkFileName,
    LPCSTR lpTargetFileName,
    SYMBOLIC_LINK_FLAGS dwFlags
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CreateSymbolicLinkA(
    <MarshalAs(UnmanagedType.LPStr)> lpSymlinkFileName As String,   ' LPCSTR
    <MarshalAs(UnmanagedType.LPStr)> lpTargetFileName As String,   ' LPCSTR
    dwFlags As UInteger   ' SYMBOLIC_LINK_FLAGS
) As Byte
End Function

' lpSymlinkFileName : LPCSTR
' lpTargetFileName : LPCSTR
' dwFlags : SYMBOLIC_LINK_FLAGS
Declare PtrSafe Function CreateSymbolicLinkA Lib "kernel32" ( _
    ByVal lpSymlinkFileName As String, _
    ByVal lpTargetFileName As String, _
    ByVal dwFlags As Long) As Byte
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CreateSymbolicLinkA = ctypes.windll.kernel32.CreateSymbolicLinkA
CreateSymbolicLinkA.restype = ctypes.c_byte
CreateSymbolicLinkA.argtypes = [
    wintypes.LPCSTR,  # lpSymlinkFileName : LPCSTR
    wintypes.LPCSTR,  # lpTargetFileName : LPCSTR
    wintypes.DWORD,  # dwFlags : SYMBOLIC_LINK_FLAGS
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
CreateSymbolicLinkA = Fiddle::Function.new(
  lib['CreateSymbolicLinkA'],
  [
    Fiddle::TYPE_VOIDP,  # lpSymlinkFileName : LPCSTR
    Fiddle::TYPE_VOIDP,  # lpTargetFileName : LPCSTR
    -Fiddle::TYPE_INT,  # dwFlags : SYMBOLIC_LINK_FLAGS
  ],
  Fiddle::TYPE_CHAR)

#[link(name = "kernel32")]
extern "system" {
    fn CreateSymbolicLinkA(
        lpSymlinkFileName: *const u8,  // LPCSTR
        lpTargetFileName: *const u8,  // LPCSTR
        dwFlags: u32  // SYMBOLIC_LINK_FLAGS
    ) -> u8;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern byte CreateSymbolicLinkA([MarshalAs(UnmanagedType.LPStr)] string lpSymlinkFileName, [MarshalAs(UnmanagedType.LPStr)] string lpTargetFileName, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_CreateSymbolicLinkA' -Namespace Win32 -PassThru
# $api::CreateSymbolicLinkA(lpSymlinkFileName, lpTargetFileName, dwFlags)

#uselib "KERNEL32.dll"
#func global CreateSymbolicLinkA "CreateSymbolicLinkA" sptr, sptr, sptr
; CreateSymbolicLinkA lpSymlinkFileName, lpTargetFileName, dwFlags   ; 戻り値は stat
; lpSymlinkFileName : LPCSTR -> "sptr"
; lpTargetFileName : LPCSTR -> "sptr"
; dwFlags : SYMBOLIC_LINK_FLAGS -> "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 CreateSymbolicLinkA "CreateSymbolicLinkA" str, str, int
; res = CreateSymbolicLinkA(lpSymlinkFileName, lpTargetFileName, dwFlags)
; lpSymlinkFileName : LPCSTR -> "str"
; lpTargetFileName : LPCSTR -> "str"
; dwFlags : SYMBOLIC_LINK_FLAGS -> "int"

; BOOLEAN CreateSymbolicLinkA(LPCSTR lpSymlinkFileName, LPCSTR lpTargetFileName, SYMBOLIC_LINK_FLAGS dwFlags)
#uselib "KERNEL32.dll"
#cfunc global CreateSymbolicLinkA "CreateSymbolicLinkA" str, str, int
; res = CreateSymbolicLinkA(lpSymlinkFileName, lpTargetFileName, dwFlags)
; lpSymlinkFileName : LPCSTR -> "str"
; lpTargetFileName : LPCSTR -> "str"
; dwFlags : SYMBOLIC_LINK_FLAGS -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procCreateSymbolicLinkA = kernel32.NewProc("CreateSymbolicLinkA")
)

// lpSymlinkFileName (LPCSTR), lpTargetFileName (LPCSTR), dwFlags (SYMBOLIC_LINK_FLAGS)
r1, _, err := procCreateSymbolicLinkA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpSymlinkFileName))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpTargetFileName))),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOLEAN

function CreateSymbolicLinkA(
  lpSymlinkFileName: PAnsiChar;   // LPCSTR
  lpTargetFileName: PAnsiChar;   // LPCSTR
  dwFlags: DWORD   // SYMBOLIC_LINK_FLAGS
): ByteBool; stdcall;
  external 'KERNEL32.dll' name 'CreateSymbolicLinkA';

result := DllCall("KERNEL32\CreateSymbolicLinkA"
    , "AStr", lpSymlinkFileName   ; LPCSTR
    , "AStr", lpTargetFileName   ; LPCSTR
    , "UInt", dwFlags   ; SYMBOLIC_LINK_FLAGS
    , "Char")   ; return: BOOLEAN

●CreateSymbolicLinkA(lpSymlinkFileName, lpTargetFileName, dwFlags) = DLL("KERNEL32.dll", "byte CreateSymbolicLinkA(char*, char*, dword)")
# 呼び出し: CreateSymbolicLinkA(lpSymlinkFileName, lpTargetFileName, dwFlags)
# lpSymlinkFileName : LPCSTR -> "char*"
# lpTargetFileName : LPCSTR -> "char*"
# dwFlags : SYMBOLIC_LINK_FLAGS -> "dword"
# 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)。