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WTSVirtualChannelPurgeOutput

関数

仮想チャネルの出力バッファをクリアする。

DLLWTSAPI32.dll呼出規約winapiSetLastErrorあり対応OSWindows Vista 以降

シグネチャ

// WTSAPI32.dll
#include <windows.h>

BOOL WTSVirtualChannelPurgeOutput(
    HANDLE hChannelHandle
);

パラメーター

名前	型	方向
hChannelHandle	HANDLE	in

戻り値の型: BOOL

各言語での呼び出し定義

// WTSAPI32.dll
#include <windows.h>

BOOL WTSVirtualChannelPurgeOutput(
    HANDLE hChannelHandle
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WTSAPI32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool WTSVirtualChannelPurgeOutput(
    IntPtr hChannelHandle   // HANDLE
);

<DllImport("WTSAPI32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WTSVirtualChannelPurgeOutput(
    hChannelHandle As IntPtr   ' HANDLE
) As Boolean
End Function

' hChannelHandle : HANDLE
Declare PtrSafe Function WTSVirtualChannelPurgeOutput Lib "wtsapi32" ( _
    ByVal hChannelHandle As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

WTSVirtualChannelPurgeOutput = ctypes.windll.wtsapi32.WTSVirtualChannelPurgeOutput
WTSVirtualChannelPurgeOutput.restype = wintypes.BOOL
WTSVirtualChannelPurgeOutput.argtypes = [
    wintypes.HANDLE,  # hChannelHandle : HANDLE
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WTSAPI32.dll')
WTSVirtualChannelPurgeOutput = Fiddle::Function.new(
  lib['WTSVirtualChannelPurgeOutput'],
  [
    Fiddle::TYPE_VOIDP,  # hChannelHandle : HANDLE
  ],
  Fiddle::TYPE_INT)

#[link(name = "wtsapi32")]
extern "system" {
    fn WTSVirtualChannelPurgeOutput(
        hChannelHandle: *mut core::ffi::c_void  // HANDLE
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WTSAPI32.dll", SetLastError = true)]
public static extern bool WTSVirtualChannelPurgeOutput(IntPtr hChannelHandle);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WTSAPI32_WTSVirtualChannelPurgeOutput' -Namespace Win32 -PassThru
# $api::WTSVirtualChannelPurgeOutput(hChannelHandle)

#uselib "WTSAPI32.dll"
#func global WTSVirtualChannelPurgeOutput "WTSVirtualChannelPurgeOutput" sptr
; WTSVirtualChannelPurgeOutput hChannelHandle   ; 戻り値は stat
; hChannelHandle : HANDLE -> "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 "WTSAPI32.dll"
#cfunc global WTSVirtualChannelPurgeOutput "WTSVirtualChannelPurgeOutput" sptr
; res = WTSVirtualChannelPurgeOutput(hChannelHandle)
; hChannelHandle : HANDLE -> "sptr"

; BOOL WTSVirtualChannelPurgeOutput(HANDLE hChannelHandle)
#uselib "WTSAPI32.dll"
#cfunc global WTSVirtualChannelPurgeOutput "WTSVirtualChannelPurgeOutput" intptr
; res = WTSVirtualChannelPurgeOutput(hChannelHandle)
; hChannelHandle : HANDLE -> "intptr"

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

var (
	wtsapi32 = windows.NewLazySystemDLL("WTSAPI32.dll")
	procWTSVirtualChannelPurgeOutput = wtsapi32.NewProc("WTSVirtualChannelPurgeOutput")
)

// hChannelHandle (HANDLE)
r1, _, err := procWTSVirtualChannelPurgeOutput.Call(
	uintptr(hChannelHandle),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function WTSVirtualChannelPurgeOutput(
  hChannelHandle: THandle   // HANDLE
): BOOL; stdcall;
  external 'WTSAPI32.dll' name 'WTSVirtualChannelPurgeOutput';

result := DllCall("WTSAPI32\WTSVirtualChannelPurgeOutput"
    , "Ptr", hChannelHandle   ; HANDLE
    , "Int")   ; return: BOOL

●WTSVirtualChannelPurgeOutput(hChannelHandle) = DLL("WTSAPI32.dll", "bool WTSVirtualChannelPurgeOutput(void*)")
# 呼び出し: WTSVirtualChannelPurgeOutput(hChannelHandle)
# hChannelHandle : HANDLE -> "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)。