CryptMemAlloc

// CRYPT32.dll
#include <windows.h>

void* CryptMemAlloc(
    DWORD cbSize
);

<DllImport("CRYPT32.dll", ExactSpelling:=True)>
Public Shared Function CryptMemAlloc(
    cbSize As UInteger   ' DWORD
) As IntPtr
End Function

' cbSize : DWORD
Declare PtrSafe Function CryptMemAlloc Lib "crypt32" ( _
    ByVal cbSize As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CryptMemAlloc = ctypes.windll.crypt32.CryptMemAlloc
CryptMemAlloc.restype = ctypes.c_void_p
CryptMemAlloc.argtypes = [
    wintypes.DWORD,  # cbSize : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CRYPT32.dll')
CryptMemAlloc = Fiddle::Function.new(
  lib['CryptMemAlloc'],
  [
    -Fiddle::TYPE_INT,  # cbSize : DWORD
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "crypt32")]
extern "system" {
    fn CryptMemAlloc(
        cbSize: u32  // DWORD
    ) -> *mut ();
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("CRYPT32.dll")]
public static extern IntPtr CryptMemAlloc(uint cbSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CRYPT32_CryptMemAlloc' -Namespace Win32 -PassThru
# $api::CryptMemAlloc(cbSize)

#uselib "CRYPT32.dll"
#func global CryptMemAlloc "CryptMemAlloc" sptr
; CryptMemAlloc cbSize   ; 戻り値は stat
; cbSize : 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 "CRYPT32.dll"
#cfunc global CryptMemAlloc "CryptMemAlloc" int
; res = CryptMemAlloc(cbSize)
; cbSize : DWORD -> "int"

; void* CryptMemAlloc(DWORD cbSize)
#uselib "CRYPT32.dll"
#cfunc global CryptMemAlloc "CryptMemAlloc" int
; res = CryptMemAlloc(cbSize)
; cbSize : DWORD -> "int"

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

var (
	crypt32 = windows.NewLazySystemDLL("CRYPT32.dll")
	procCryptMemAlloc = crypt32.NewProc("CryptMemAlloc")
)

// cbSize (DWORD)
r1, _, err := procCryptMemAlloc.Call(
	uintptr(cbSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void*

function CryptMemAlloc(
  cbSize: DWORD   // DWORD
): Pointer; stdcall;
  external 'CRYPT32.dll' name 'CryptMemAlloc';

result := DllCall("CRYPT32\CryptMemAlloc"
    , "UInt", cbSize   ; DWORD
    , "Ptr")   ; return: void*

●CryptMemAlloc(cbSize) = DLL("CRYPT32.dll", "void* CryptMemAlloc(dword)")
# 呼び出し: CryptMemAlloc(cbSize)
# cbSize : 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)。