SetProcessWorkingSetSizeEx

// KERNEL32.dll
#include <windows.h>

BOOL SetProcessWorkingSetSizeEx(
    HANDLE hProcess,
    UINT_PTR dwMinimumWorkingSetSize,
    UINT_PTR dwMaximumWorkingSetSize,
    SETPROCESSWORKINGSETSIZEEX_FLAGS Flags
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetProcessWorkingSetSizeEx(
    hProcess As IntPtr,   ' HANDLE
    dwMinimumWorkingSetSize As UIntPtr,   ' UINT_PTR
    dwMaximumWorkingSetSize As UIntPtr,   ' UINT_PTR
    Flags As UInteger   ' SETPROCESSWORKINGSETSIZEEX_FLAGS
) As Boolean
End Function

' hProcess : HANDLE
' dwMinimumWorkingSetSize : UINT_PTR
' dwMaximumWorkingSetSize : UINT_PTR
' Flags : SETPROCESSWORKINGSETSIZEEX_FLAGS
Declare PtrSafe Function SetProcessWorkingSetSizeEx Lib "kernel32" ( _
    ByVal hProcess As LongPtr, _
    ByVal dwMinimumWorkingSetSize As LongPtr, _
    ByVal dwMaximumWorkingSetSize As LongPtr, _
    ByVal Flags 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

SetProcessWorkingSetSizeEx = ctypes.windll.kernel32.SetProcessWorkingSetSizeEx
SetProcessWorkingSetSizeEx.restype = wintypes.BOOL
SetProcessWorkingSetSizeEx.argtypes = [
    wintypes.HANDLE,  # hProcess : HANDLE
    ctypes.c_size_t,  # dwMinimumWorkingSetSize : UINT_PTR
    ctypes.c_size_t,  # dwMaximumWorkingSetSize : UINT_PTR
    wintypes.DWORD,  # Flags : SETPROCESSWORKINGSETSIZEEX_FLAGS
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
SetProcessWorkingSetSizeEx = Fiddle::Function.new(
  lib['SetProcessWorkingSetSizeEx'],
  [
    Fiddle::TYPE_VOIDP,  # hProcess : HANDLE
    Fiddle::TYPE_UINTPTR_T,  # dwMinimumWorkingSetSize : UINT_PTR
    Fiddle::TYPE_UINTPTR_T,  # dwMaximumWorkingSetSize : UINT_PTR
    -Fiddle::TYPE_INT,  # Flags : SETPROCESSWORKINGSETSIZEEX_FLAGS
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn SetProcessWorkingSetSizeEx(
        hProcess: *mut core::ffi::c_void,  // HANDLE
        dwMinimumWorkingSetSize: usize,  // UINT_PTR
        dwMaximumWorkingSetSize: usize,  // UINT_PTR
        Flags: u32  // SETPROCESSWORKINGSETSIZEEX_FLAGS
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool SetProcessWorkingSetSizeEx(IntPtr hProcess, UIntPtr dwMinimumWorkingSetSize, UIntPtr dwMaximumWorkingSetSize, uint Flags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_SetProcessWorkingSetSizeEx' -Namespace Win32 -PassThru
# $api::SetProcessWorkingSetSizeEx(hProcess, dwMinimumWorkingSetSize, dwMaximumWorkingSetSize, Flags)

#uselib "KERNEL32.dll"
#func global SetProcessWorkingSetSizeEx "SetProcessWorkingSetSizeEx" sptr, sptr, sptr, sptr
; SetProcessWorkingSetSizeEx hProcess, dwMinimumWorkingSetSize, dwMaximumWorkingSetSize, Flags   ; 戻り値は stat
; hProcess : HANDLE -> "sptr"
; dwMinimumWorkingSetSize : UINT_PTR -> "sptr"
; dwMaximumWorkingSetSize : UINT_PTR -> "sptr"
; Flags : SETPROCESSWORKINGSETSIZEEX_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 SetProcessWorkingSetSizeEx "SetProcessWorkingSetSizeEx" sptr, sptr, sptr, int
; res = SetProcessWorkingSetSizeEx(hProcess, dwMinimumWorkingSetSize, dwMaximumWorkingSetSize, Flags)
; hProcess : HANDLE -> "sptr"
; dwMinimumWorkingSetSize : UINT_PTR -> "sptr"
; dwMaximumWorkingSetSize : UINT_PTR -> "sptr"
; Flags : SETPROCESSWORKINGSETSIZEEX_FLAGS -> "int"

; BOOL SetProcessWorkingSetSizeEx(HANDLE hProcess, UINT_PTR dwMinimumWorkingSetSize, UINT_PTR dwMaximumWorkingSetSize, SETPROCESSWORKINGSETSIZEEX_FLAGS Flags)
#uselib "KERNEL32.dll"
#cfunc global SetProcessWorkingSetSizeEx "SetProcessWorkingSetSizeEx" intptr, intptr, intptr, int
; res = SetProcessWorkingSetSizeEx(hProcess, dwMinimumWorkingSetSize, dwMaximumWorkingSetSize, Flags)
; hProcess : HANDLE -> "intptr"
; dwMinimumWorkingSetSize : UINT_PTR -> "intptr"
; dwMaximumWorkingSetSize : UINT_PTR -> "intptr"
; Flags : SETPROCESSWORKINGSETSIZEEX_FLAGS -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procSetProcessWorkingSetSizeEx = kernel32.NewProc("SetProcessWorkingSetSizeEx")
)

// hProcess (HANDLE), dwMinimumWorkingSetSize (UINT_PTR), dwMaximumWorkingSetSize (UINT_PTR), Flags (SETPROCESSWORKINGSETSIZEEX_FLAGS)
r1, _, err := procSetProcessWorkingSetSizeEx.Call(
	uintptr(hProcess),
	uintptr(dwMinimumWorkingSetSize),
	uintptr(dwMaximumWorkingSetSize),
	uintptr(Flags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SetProcessWorkingSetSizeEx(
  hProcess: THandle;   // HANDLE
  dwMinimumWorkingSetSize: NativeUInt;   // UINT_PTR
  dwMaximumWorkingSetSize: NativeUInt;   // UINT_PTR
  Flags: DWORD   // SETPROCESSWORKINGSETSIZEEX_FLAGS
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'SetProcessWorkingSetSizeEx';

result := DllCall("KERNEL32\SetProcessWorkingSetSizeEx"
    , "Ptr", hProcess   ; HANDLE
    , "UPtr", dwMinimumWorkingSetSize   ; UINT_PTR
    , "UPtr", dwMaximumWorkingSetSize   ; UINT_PTR
    , "UInt", Flags   ; SETPROCESSWORKINGSETSIZEEX_FLAGS
    , "Int")   ; return: BOOL

●SetProcessWorkingSetSizeEx(hProcess, dwMinimumWorkingSetSize, dwMaximumWorkingSetSize, Flags) = DLL("KERNEL32.dll", "bool SetProcessWorkingSetSizeEx(void*, int, int, dword)")
# 呼び出し: SetProcessWorkingSetSizeEx(hProcess, dwMinimumWorkingSetSize, dwMaximumWorkingSetSize, Flags)
# hProcess : HANDLE -> "void*"
# dwMinimumWorkingSetSize : UINT_PTR -> "int"
# dwMaximumWorkingSetSize : UINT_PTR -> "int"
# Flags : SETPROCESSWORKINGSETSIZEEX_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)。