HttpSendRequestA

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

BOOL HttpSendRequestA(
    void* hRequest,
    LPCSTR lpszHeaders,   // optional
    DWORD dwHeadersLength,
    void* lpOptional,   // optional
    DWORD dwOptionalLength
);

<DllImport("WININET.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function HttpSendRequestA(
    hRequest As IntPtr,   ' void*
    <MarshalAs(UnmanagedType.LPStr)> lpszHeaders As String,   ' LPCSTR optional
    dwHeadersLength As UInteger,   ' DWORD
    lpOptional As IntPtr,   ' void* optional
    dwOptionalLength As UInteger   ' DWORD
) As Boolean
End Function

' hRequest : void*
' lpszHeaders : LPCSTR optional
' dwHeadersLength : DWORD
' lpOptional : void* optional
' dwOptionalLength : DWORD
Declare PtrSafe Function HttpSendRequestA Lib "wininet" ( _
    ByVal hRequest As LongPtr, _
    ByVal lpszHeaders As String, _
    ByVal dwHeadersLength As Long, _
    ByVal lpOptional As LongPtr, _
    ByVal dwOptionalLength 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

HttpSendRequestA = ctypes.windll.wininet.HttpSendRequestA
HttpSendRequestA.restype = wintypes.BOOL
HttpSendRequestA.argtypes = [
    ctypes.POINTER(None),  # hRequest : void*
    wintypes.LPCSTR,  # lpszHeaders : LPCSTR optional
    wintypes.DWORD,  # dwHeadersLength : DWORD
    ctypes.POINTER(None),  # lpOptional : void* optional
    wintypes.DWORD,  # dwOptionalLength : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
HttpSendRequestA = Fiddle::Function.new(
  lib['HttpSendRequestA'],
  [
    Fiddle::TYPE_VOIDP,  # hRequest : void*
    Fiddle::TYPE_VOIDP,  # lpszHeaders : LPCSTR optional
    -Fiddle::TYPE_INT,  # dwHeadersLength : DWORD
    Fiddle::TYPE_VOIDP,  # lpOptional : void* optional
    -Fiddle::TYPE_INT,  # dwOptionalLength : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "wininet")]
extern "system" {
    fn HttpSendRequestA(
        hRequest: *mut (),  // void*
        lpszHeaders: *const u8,  // LPCSTR optional
        dwHeadersLength: u32,  // DWORD
        lpOptional: *mut (),  // void* optional
        dwOptionalLength: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WININET.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern bool HttpSendRequestA(IntPtr hRequest, [MarshalAs(UnmanagedType.LPStr)] string lpszHeaders, uint dwHeadersLength, IntPtr lpOptional, uint dwOptionalLength);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_HttpSendRequestA' -Namespace Win32 -PassThru
# $api::HttpSendRequestA(hRequest, lpszHeaders, dwHeadersLength, lpOptional, dwOptionalLength)

#uselib "WININET.dll"
#func global HttpSendRequestA "HttpSendRequestA" sptr, sptr, sptr, sptr, sptr
; HttpSendRequestA hRequest, lpszHeaders, dwHeadersLength, lpOptional, dwOptionalLength   ; 戻り値は stat
; hRequest : void* -> "sptr"
; lpszHeaders : LPCSTR optional -> "sptr"
; dwHeadersLength : DWORD -> "sptr"
; lpOptional : void* optional -> "sptr"
; dwOptionalLength : DWORD -> "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 "WININET.dll"
#cfunc global HttpSendRequestA "HttpSendRequestA" sptr, str, int, sptr, int
; res = HttpSendRequestA(hRequest, lpszHeaders, dwHeadersLength, lpOptional, dwOptionalLength)
; hRequest : void* -> "sptr"
; lpszHeaders : LPCSTR optional -> "str"
; dwHeadersLength : DWORD -> "int"
; lpOptional : void* optional -> "sptr"
; dwOptionalLength : DWORD -> "int"

; BOOL HttpSendRequestA(void* hRequest, LPCSTR lpszHeaders, DWORD dwHeadersLength, void* lpOptional, DWORD dwOptionalLength)
#uselib "WININET.dll"
#cfunc global HttpSendRequestA "HttpSendRequestA" intptr, str, int, intptr, int
; res = HttpSendRequestA(hRequest, lpszHeaders, dwHeadersLength, lpOptional, dwOptionalLength)
; hRequest : void* -> "intptr"
; lpszHeaders : LPCSTR optional -> "str"
; dwHeadersLength : DWORD -> "int"
; lpOptional : void* optional -> "intptr"
; dwOptionalLength : DWORD -> "int"

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

var (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procHttpSendRequestA = wininet.NewProc("HttpSendRequestA")
)

// hRequest (void*), lpszHeaders (LPCSTR optional), dwHeadersLength (DWORD), lpOptional (void* optional), dwOptionalLength (DWORD)
r1, _, err := procHttpSendRequestA.Call(
	uintptr(hRequest),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpszHeaders))),
	uintptr(dwHeadersLength),
	uintptr(lpOptional),
	uintptr(dwOptionalLength),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function HttpSendRequestA(
  hRequest: Pointer;   // void*
  lpszHeaders: PAnsiChar;   // LPCSTR optional
  dwHeadersLength: DWORD;   // DWORD
  lpOptional: Pointer;   // void* optional
  dwOptionalLength: DWORD   // DWORD
): BOOL; stdcall;
  external 'WININET.dll' name 'HttpSendRequestA';

result := DllCall("WININET\HttpSendRequestA"
    , "Ptr", hRequest   ; void*
    , "AStr", lpszHeaders   ; LPCSTR optional
    , "UInt", dwHeadersLength   ; DWORD
    , "Ptr", lpOptional   ; void* optional
    , "UInt", dwOptionalLength   ; DWORD
    , "Int")   ; return: BOOL

●HttpSendRequestA(hRequest, lpszHeaders, dwHeadersLength, lpOptional, dwOptionalLength) = DLL("WININET.dll", "bool HttpSendRequestA(void*, char*, dword, void*, dword)")
# 呼び出し: HttpSendRequestA(hRequest, lpszHeaders, dwHeadersLength, lpOptional, dwOptionalLength)
# hRequest : void* -> "void*"
# lpszHeaders : LPCSTR optional -> "char*"
# dwHeadersLength : DWORD -> "dword"
# lpOptional : void* optional -> "void*"
# dwOptionalLength : DWORD -> "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)。