SetThreadpoolThreadMaximum

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

void SetThreadpoolThreadMaximum(
    PTP_POOL ptpp,
    DWORD cthrdMost
);

<DllImport("KERNEL32.dll", ExactSpelling:=True)>
Public Shared Sub SetThreadpoolThreadMaximum(
    ptpp As IntPtr,   ' PTP_POOL
    cthrdMost As UInteger   ' DWORD
)
End Sub

' ptpp : PTP_POOL
' cthrdMost : DWORD
Declare PtrSafe Sub SetThreadpoolThreadMaximum Lib "kernel32" ( _
    ByVal ptpp As LongPtr, _
    ByVal cthrdMost As Long)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SetThreadpoolThreadMaximum = ctypes.windll.kernel32.SetThreadpoolThreadMaximum
SetThreadpoolThreadMaximum.restype = None
SetThreadpoolThreadMaximum.argtypes = [
    ctypes.c_ssize_t,  # ptpp : PTP_POOL
    wintypes.DWORD,  # cthrdMost : DWORD
]

require 'fiddle'
require 'fiddle/import'

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

#[link(name = "kernel32")]
extern "system" {
    fn SetThreadpoolThreadMaximum(
        ptpp: isize,  // PTP_POOL
        cthrdMost: u32  // DWORD
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll")]
public static extern void SetThreadpoolThreadMaximum(IntPtr ptpp, uint cthrdMost);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_SetThreadpoolThreadMaximum' -Namespace Win32 -PassThru
# $api::SetThreadpoolThreadMaximum(ptpp, cthrdMost)

#uselib "KERNEL32.dll"
#func global SetThreadpoolThreadMaximum "SetThreadpoolThreadMaximum" sptr, sptr
; SetThreadpoolThreadMaximum ptpp, cthrdMost
; ptpp : PTP_POOL -> "sptr"
; cthrdMost : DWORD -> "sptr"

#uselib "KERNEL32.dll"
#func global SetThreadpoolThreadMaximum "SetThreadpoolThreadMaximum" sptr, int
; SetThreadpoolThreadMaximum ptpp, cthrdMost
; ptpp : PTP_POOL -> "sptr"
; cthrdMost : DWORD -> "int"

; void SetThreadpoolThreadMaximum(PTP_POOL ptpp, DWORD cthrdMost)
#uselib "KERNEL32.dll"
#func global SetThreadpoolThreadMaximum "SetThreadpoolThreadMaximum" intptr, int
; SetThreadpoolThreadMaximum ptpp, cthrdMost
; ptpp : PTP_POOL -> "intptr"
; cthrdMost : DWORD -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procSetThreadpoolThreadMaximum = kernel32.NewProc("SetThreadpoolThreadMaximum")
)

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

procedure SetThreadpoolThreadMaximum(
  ptpp: NativeInt;   // PTP_POOL
  cthrdMost: DWORD   // DWORD
); stdcall;
  external 'KERNEL32.dll' name 'SetThreadpoolThreadMaximum';

result := DllCall("KERNEL32\SetThreadpoolThreadMaximum"
    , "Ptr", ptpp   ; PTP_POOL
    , "UInt", cthrdMost   ; DWORD
    , "Int")   ; return: void

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