WTSVirtualChannelWrite

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

BOOL WTSVirtualChannelWrite(
    HANDLE hChannelHandle,
    LPSTR Buffer,
    DWORD Length,
    DWORD* pBytesWritten
);

<DllImport("WTSAPI32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WTSVirtualChannelWrite(
    hChannelHandle As IntPtr,   ' HANDLE
    <MarshalAs(UnmanagedType.LPStr)> Buffer As String,   ' LPSTR
    Length As UInteger,   ' DWORD
    <Out> ByRef pBytesWritten As UInteger   ' DWORD* out
) As Boolean
End Function

' hChannelHandle : HANDLE
' Buffer : LPSTR
' Length : DWORD
' pBytesWritten : DWORD* out
Declare PtrSafe Function WTSVirtualChannelWrite Lib "wtsapi32" ( _
    ByVal hChannelHandle As LongPtr, _
    ByVal Buffer As String, _
    ByVal Length As Long, _
    ByRef pBytesWritten 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

WTSVirtualChannelWrite = ctypes.windll.wtsapi32.WTSVirtualChannelWrite
WTSVirtualChannelWrite.restype = wintypes.BOOL
WTSVirtualChannelWrite.argtypes = [
    wintypes.HANDLE,  # hChannelHandle : HANDLE
    wintypes.LPCSTR,  # Buffer : LPSTR
    wintypes.DWORD,  # Length : DWORD
    ctypes.POINTER(wintypes.DWORD),  # pBytesWritten : DWORD* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WTSAPI32.dll')
WTSVirtualChannelWrite = Fiddle::Function.new(
  lib['WTSVirtualChannelWrite'],
  [
    Fiddle::TYPE_VOIDP,  # hChannelHandle : HANDLE
    Fiddle::TYPE_VOIDP,  # Buffer : LPSTR
    -Fiddle::TYPE_INT,  # Length : DWORD
    Fiddle::TYPE_VOIDP,  # pBytesWritten : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "wtsapi32")]
extern "system" {
    fn WTSVirtualChannelWrite(
        hChannelHandle: *mut core::ffi::c_void,  // HANDLE
        Buffer: *mut u8,  // LPSTR
        Length: u32,  // DWORD
        pBytesWritten: *mut u32  // DWORD* out
    ) -> 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 WTSVirtualChannelWrite(IntPtr hChannelHandle, [MarshalAs(UnmanagedType.LPStr)] string Buffer, uint Length, out uint pBytesWritten);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WTSAPI32_WTSVirtualChannelWrite' -Namespace Win32 -PassThru
# $api::WTSVirtualChannelWrite(hChannelHandle, Buffer, Length, pBytesWritten)

#uselib "WTSAPI32.dll"
#func global WTSVirtualChannelWrite "WTSVirtualChannelWrite" sptr, sptr, sptr, sptr
; WTSVirtualChannelWrite hChannelHandle, Buffer, Length, varptr(pBytesWritten)   ; 戻り値は stat
; hChannelHandle : HANDLE -> "sptr"
; Buffer : LPSTR -> "sptr"
; Length : DWORD -> "sptr"
; pBytesWritten : DWORD* 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 "WTSAPI32.dll"
#cfunc global WTSVirtualChannelWrite "WTSVirtualChannelWrite" sptr, str, int, var
; res = WTSVirtualChannelWrite(hChannelHandle, Buffer, Length, pBytesWritten)
; hChannelHandle : HANDLE -> "sptr"
; Buffer : LPSTR -> "str"
; Length : DWORD -> "int"
; pBytesWritten : DWORD* 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。

; BOOL WTSVirtualChannelWrite(HANDLE hChannelHandle, LPSTR Buffer, DWORD Length, DWORD* pBytesWritten)
#uselib "WTSAPI32.dll"
#cfunc global WTSVirtualChannelWrite "WTSVirtualChannelWrite" intptr, str, int, var
; res = WTSVirtualChannelWrite(hChannelHandle, Buffer, Length, pBytesWritten)
; hChannelHandle : HANDLE -> "intptr"
; Buffer : LPSTR -> "str"
; Length : DWORD -> "int"
; pBytesWritten : DWORD* 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 (
	wtsapi32 = windows.NewLazySystemDLL("WTSAPI32.dll")
	procWTSVirtualChannelWrite = wtsapi32.NewProc("WTSVirtualChannelWrite")
)

// hChannelHandle (HANDLE), Buffer (LPSTR), Length (DWORD), pBytesWritten (DWORD* out)
r1, _, err := procWTSVirtualChannelWrite.Call(
	uintptr(hChannelHandle),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(Buffer))),
	uintptr(Length),
	uintptr(pBytesWritten),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function WTSVirtualChannelWrite(
  hChannelHandle: THandle;   // HANDLE
  Buffer: PAnsiChar;   // LPSTR
  Length: DWORD;   // DWORD
  pBytesWritten: Pointer   // DWORD* out
): BOOL; stdcall;
  external 'WTSAPI32.dll' name 'WTSVirtualChannelWrite';

result := DllCall("WTSAPI32\WTSVirtualChannelWrite"
    , "Ptr", hChannelHandle   ; HANDLE
    , "AStr", Buffer   ; LPSTR
    , "UInt", Length   ; DWORD
    , "Ptr", pBytesWritten   ; DWORD* out
    , "Int")   ; return: BOOL

●WTSVirtualChannelWrite(hChannelHandle, Buffer, Length, pBytesWritten) = DLL("WTSAPI32.dll", "bool WTSVirtualChannelWrite(void*, char*, dword, void*)")
# 呼び出し: WTSVirtualChannelWrite(hChannelHandle, Buffer, Length, pBytesWritten)
# hChannelHandle : HANDLE -> "void*"
# Buffer : LPSTR -> "char*"
# Length : DWORD -> "dword"
# pBytesWritten : DWORD* 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)。