SetThreadpoolThreadMinimum

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

BOOL SetThreadpoolThreadMinimum(
    PTP_POOL ptpp,
    DWORD cthrdMic
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetThreadpoolThreadMinimum(
    ptpp As IntPtr,   ' PTP_POOL
    cthrdMic As UInteger   ' DWORD
) As Boolean
End Function

' ptpp : PTP_POOL
' cthrdMic : DWORD
Declare PtrSafe Function SetThreadpoolThreadMinimum Lib "kernel32" ( _
    ByVal ptpp As LongPtr, _
    ByVal cthrdMic 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

SetThreadpoolThreadMinimum = ctypes.windll.kernel32.SetThreadpoolThreadMinimum
SetThreadpoolThreadMinimum.restype = wintypes.BOOL
SetThreadpoolThreadMinimum.argtypes = [
    ctypes.c_ssize_t,  # ptpp : PTP_POOL
    wintypes.DWORD,  # cthrdMic : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
SetThreadpoolThreadMinimum = Fiddle::Function.new(
  lib['SetThreadpoolThreadMinimum'],
  [
    Fiddle::TYPE_INTPTR_T,  # ptpp : PTP_POOL
    -Fiddle::TYPE_INT,  # cthrdMic : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn SetThreadpoolThreadMinimum(
        ptpp: isize,  // PTP_POOL
        cthrdMic: u32  // DWORD
    ) -> 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 SetThreadpoolThreadMinimum(IntPtr ptpp, uint cthrdMic);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_SetThreadpoolThreadMinimum' -Namespace Win32 -PassThru
# $api::SetThreadpoolThreadMinimum(ptpp, cthrdMic)

#uselib "KERNEL32.dll"
#func global SetThreadpoolThreadMinimum "SetThreadpoolThreadMinimum" sptr, sptr
; SetThreadpoolThreadMinimum ptpp, cthrdMic   ; 戻り値は stat
; ptpp : PTP_POOL -> "sptr"
; cthrdMic : 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 "KERNEL32.dll"
#cfunc global SetThreadpoolThreadMinimum "SetThreadpoolThreadMinimum" sptr, int
; res = SetThreadpoolThreadMinimum(ptpp, cthrdMic)
; ptpp : PTP_POOL -> "sptr"
; cthrdMic : DWORD -> "int"

; BOOL SetThreadpoolThreadMinimum(PTP_POOL ptpp, DWORD cthrdMic)
#uselib "KERNEL32.dll"
#cfunc global SetThreadpoolThreadMinimum "SetThreadpoolThreadMinimum" intptr, int
; res = SetThreadpoolThreadMinimum(ptpp, cthrdMic)
; ptpp : PTP_POOL -> "intptr"
; cthrdMic : DWORD -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procSetThreadpoolThreadMinimum = kernel32.NewProc("SetThreadpoolThreadMinimum")
)

// ptpp (PTP_POOL), cthrdMic (DWORD)
r1, _, err := procSetThreadpoolThreadMinimum.Call(
	uintptr(ptpp),
	uintptr(cthrdMic),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SetThreadpoolThreadMinimum(
  ptpp: NativeInt;   // PTP_POOL
  cthrdMic: DWORD   // DWORD
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'SetThreadpoolThreadMinimum';

result := DllCall("KERNEL32\SetThreadpoolThreadMinimum"
    , "Ptr", ptpp   ; PTP_POOL
    , "UInt", cthrdMic   ; DWORD
    , "Int")   ; return: BOOL

●SetThreadpoolThreadMinimum(ptpp, cthrdMic) = DLL("KERNEL32.dll", "bool SetThreadpoolThreadMinimum(int, dword)")
# 呼び出し: SetThreadpoolThreadMinimum(ptpp, cthrdMic)
# ptpp : PTP_POOL -> "int"
# cthrdMic : 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)。