RtwqGetWorkQueueMMCSSClass

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

HRESULT RtwqGetWorkQueueMMCSSClass(
    DWORD workQueueId,
    LPWSTR usageClass,   // optional
    DWORD* usageClassLength
);

<DllImport("RTWorkQ.dll", ExactSpelling:=True)>
Public Shared Function RtwqGetWorkQueueMMCSSClass(
    workQueueId As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> usageClass As System.Text.StringBuilder,   ' LPWSTR optional, out
    ByRef usageClassLength As UInteger   ' DWORD* in/out
) As Integer
End Function

' workQueueId : DWORD
' usageClass : LPWSTR optional, out
' usageClassLength : DWORD* in/out
Declare PtrSafe Function RtwqGetWorkQueueMMCSSClass Lib "rtworkq" ( _
    ByVal workQueueId As Long, _
    ByVal usageClass As LongPtr, _
    ByRef usageClassLength 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

RtwqGetWorkQueueMMCSSClass = ctypes.windll.rtworkq.RtwqGetWorkQueueMMCSSClass
RtwqGetWorkQueueMMCSSClass.restype = ctypes.c_int
RtwqGetWorkQueueMMCSSClass.argtypes = [
    wintypes.DWORD,  # workQueueId : DWORD
    wintypes.LPWSTR,  # usageClass : LPWSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # usageClassLength : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('RTWorkQ.dll')
RtwqGetWorkQueueMMCSSClass = Fiddle::Function.new(
  lib['RtwqGetWorkQueueMMCSSClass'],
  [
    -Fiddle::TYPE_INT,  # workQueueId : DWORD
    Fiddle::TYPE_VOIDP,  # usageClass : LPWSTR optional, out
    Fiddle::TYPE_VOIDP,  # usageClassLength : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "rtworkq")]
extern "system" {
    fn RtwqGetWorkQueueMMCSSClass(
        workQueueId: u32,  // DWORD
        usageClass: *mut u16,  // LPWSTR optional, out
        usageClassLength: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("RTWorkQ.dll")]
public static extern int RtwqGetWorkQueueMMCSSClass(uint workQueueId, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder usageClass, ref uint usageClassLength);
"@
$api = Add-Type -MemberDefinition $sig -Name 'RTWorkQ_RtwqGetWorkQueueMMCSSClass' -Namespace Win32 -PassThru
# $api::RtwqGetWorkQueueMMCSSClass(workQueueId, usageClass, usageClassLength)

#uselib "RTWorkQ.dll"
#func global RtwqGetWorkQueueMMCSSClass "RtwqGetWorkQueueMMCSSClass" sptr, sptr, sptr
; RtwqGetWorkQueueMMCSSClass workQueueId, varptr(usageClass), varptr(usageClassLength)   ; 戻り値は stat
; workQueueId : DWORD -> "sptr"
; usageClass : LPWSTR optional, out -> "sptr"
; usageClassLength : DWORD* in/out -> "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 "RTWorkQ.dll"
#cfunc global RtwqGetWorkQueueMMCSSClass "RtwqGetWorkQueueMMCSSClass" int, var, var
; res = RtwqGetWorkQueueMMCSSClass(workQueueId, usageClass, usageClassLength)
; workQueueId : DWORD -> "int"
; usageClass : LPWSTR optional, out -> "var"
; usageClassLength : DWORD* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; HRESULT RtwqGetWorkQueueMMCSSClass(DWORD workQueueId, LPWSTR usageClass, DWORD* usageClassLength)
#uselib "RTWorkQ.dll"
#cfunc global RtwqGetWorkQueueMMCSSClass "RtwqGetWorkQueueMMCSSClass" int, var, var
; res = RtwqGetWorkQueueMMCSSClass(workQueueId, usageClass, usageClassLength)
; workQueueId : DWORD -> "int"
; usageClass : LPWSTR optional, out -> "var"
; usageClassLength : DWORD* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	rtworkq = windows.NewLazySystemDLL("RTWorkQ.dll")
	procRtwqGetWorkQueueMMCSSClass = rtworkq.NewProc("RtwqGetWorkQueueMMCSSClass")
)

// workQueueId (DWORD), usageClass (LPWSTR optional, out), usageClassLength (DWORD* in/out)
r1, _, err := procRtwqGetWorkQueueMMCSSClass.Call(
	uintptr(workQueueId),
	uintptr(usageClass),
	uintptr(usageClassLength),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function RtwqGetWorkQueueMMCSSClass(
  workQueueId: DWORD;   // DWORD
  usageClass: PWideChar;   // LPWSTR optional, out
  usageClassLength: Pointer   // DWORD* in/out
): Integer; stdcall;
  external 'RTWorkQ.dll' name 'RtwqGetWorkQueueMMCSSClass';

result := DllCall("RTWorkQ\RtwqGetWorkQueueMMCSSClass"
    , "UInt", workQueueId   ; DWORD
    , "Ptr", usageClass   ; LPWSTR optional, out
    , "Ptr", usageClassLength   ; DWORD* in/out
    , "Int")   ; return: HRESULT

●RtwqGetWorkQueueMMCSSClass(workQueueId, usageClass, usageClassLength) = DLL("RTWorkQ.dll", "int RtwqGetWorkQueueMMCSSClass(dword, char*, void*)")
# 呼び出し: RtwqGetWorkQueueMMCSSClass(workQueueId, usageClass, usageClassLength)
# workQueueId : DWORD -> "dword"
# usageClass : LPWSTR optional, out -> "char*"
# usageClassLength : DWORD* in/out -> "void*"
# 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)。