CoTaskMemAlloc

// OLE32.dll
#include <windows.h>

void* CoTaskMemAlloc(
    UINT_PTR cb
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function CoTaskMemAlloc(
    cb As UIntPtr   ' UINT_PTR
) As IntPtr
End Function

' cb : UINT_PTR
Declare PtrSafe Function CoTaskMemAlloc Lib "ole32" ( _
    ByVal cb As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CoTaskMemAlloc = ctypes.windll.ole32.CoTaskMemAlloc
CoTaskMemAlloc.restype = ctypes.c_void_p
CoTaskMemAlloc.argtypes = [
    ctypes.c_size_t,  # cb : UINT_PTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
CoTaskMemAlloc = Fiddle::Function.new(
  lib['CoTaskMemAlloc'],
  [
    Fiddle::TYPE_UINTPTR_T,  # cb : UINT_PTR
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "ole32")]
extern "system" {
    fn CoTaskMemAlloc(
        cb: usize  // UINT_PTR
    ) -> *mut ();
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLE32.dll")]
public static extern IntPtr CoTaskMemAlloc(UIntPtr cb);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_CoTaskMemAlloc' -Namespace Win32 -PassThru
# $api::CoTaskMemAlloc(cb)

#uselib "OLE32.dll"
#func global CoTaskMemAlloc "CoTaskMemAlloc" sptr
; CoTaskMemAlloc cb   ; 戻り値は stat
; cb : UINT_PTR -> "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 "OLE32.dll"
#cfunc global CoTaskMemAlloc "CoTaskMemAlloc" sptr
; res = CoTaskMemAlloc(cb)
; cb : UINT_PTR -> "sptr"

; void* CoTaskMemAlloc(UINT_PTR cb)
#uselib "OLE32.dll"
#cfunc global CoTaskMemAlloc "CoTaskMemAlloc" intptr
; res = CoTaskMemAlloc(cb)
; cb : UINT_PTR -> "intptr"

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

var (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procCoTaskMemAlloc = ole32.NewProc("CoTaskMemAlloc")
)

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

function CoTaskMemAlloc(
  cb: NativeUInt   // UINT_PTR
): Pointer; stdcall;
  external 'OLE32.dll' name 'CoTaskMemAlloc';

result := DllCall("OLE32\CoTaskMemAlloc"
    , "UPtr", cb   ; UINT_PTR
    , "Ptr")   ; return: void*

●CoTaskMemAlloc(cb) = DLL("OLE32.dll", "void* CoTaskMemAlloc(int)")
# 呼び出し: CoTaskMemAlloc(cb)
# cb : UINT_PTR -> "int"
# 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)。