PrjWriteFileData

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

HRESULT PrjWriteFileData(
    PRJ_NAMESPACE_VIRTUALIZATION_CONTEXT namespaceVirtualizationContext,
    const GUID* dataStreamId,
    void* buffer,
    ULONGLONG byteOffset,
    DWORD length
);

<DllImport("PROJECTEDFSLIB.dll", ExactSpelling:=True)>
Public Shared Function PrjWriteFileData(
    namespaceVirtualizationContext As IntPtr,   ' PRJ_NAMESPACE_VIRTUALIZATION_CONTEXT
    ByRef dataStreamId As Guid,   ' GUID*
    buffer As IntPtr,   ' void*
    byteOffset As ULong,   ' ULONGLONG
    length As UInteger   ' DWORD
) As Integer
End Function

' namespaceVirtualizationContext : PRJ_NAMESPACE_VIRTUALIZATION_CONTEXT
' dataStreamId : GUID*
' buffer : void*
' byteOffset : ULONGLONG
' length : DWORD
Declare PtrSafe Function PrjWriteFileData Lib "projectedfslib" ( _
    ByVal namespaceVirtualizationContext As LongPtr, _
    ByVal dataStreamId As LongPtr, _
    ByVal buffer As LongPtr, _
    ByVal byteOffset As LongLong, _
    ByVal length 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

PrjWriteFileData = ctypes.windll.projectedfslib.PrjWriteFileData
PrjWriteFileData.restype = ctypes.c_int
PrjWriteFileData.argtypes = [
    wintypes.HANDLE,  # namespaceVirtualizationContext : PRJ_NAMESPACE_VIRTUALIZATION_CONTEXT
    ctypes.c_void_p,  # dataStreamId : GUID*
    ctypes.POINTER(None),  # buffer : void*
    ctypes.c_ulonglong,  # byteOffset : ULONGLONG
    wintypes.DWORD,  # length : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('PROJECTEDFSLIB.dll')
PrjWriteFileData = Fiddle::Function.new(
  lib['PrjWriteFileData'],
  [
    Fiddle::TYPE_VOIDP,  # namespaceVirtualizationContext : PRJ_NAMESPACE_VIRTUALIZATION_CONTEXT
    Fiddle::TYPE_VOIDP,  # dataStreamId : GUID*
    Fiddle::TYPE_VOIDP,  # buffer : void*
    -Fiddle::TYPE_LONG_LONG,  # byteOffset : ULONGLONG
    -Fiddle::TYPE_INT,  # length : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "projectedfslib")]
extern "system" {
    fn PrjWriteFileData(
        namespaceVirtualizationContext: *mut core::ffi::c_void,  // PRJ_NAMESPACE_VIRTUALIZATION_CONTEXT
        dataStreamId: *const GUID,  // GUID*
        buffer: *mut (),  // void*
        byteOffset: u64,  // ULONGLONG
        length: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("PROJECTEDFSLIB.dll")]
public static extern int PrjWriteFileData(IntPtr namespaceVirtualizationContext, ref Guid dataStreamId, IntPtr buffer, ulong byteOffset, uint length);
"@
$api = Add-Type -MemberDefinition $sig -Name 'PROJECTEDFSLIB_PrjWriteFileData' -Namespace Win32 -PassThru
# $api::PrjWriteFileData(namespaceVirtualizationContext, dataStreamId, buffer, byteOffset, length)

#uselib "PROJECTEDFSLIB.dll"
#func global PrjWriteFileData "PrjWriteFileData" sptr, sptr, sptr, sptr, sptr
; PrjWriteFileData namespaceVirtualizationContext, varptr(dataStreamId), buffer, byteOffset, length   ; 戻り値は stat
; namespaceVirtualizationContext : PRJ_NAMESPACE_VIRTUALIZATION_CONTEXT -> "sptr"
; dataStreamId : GUID* -> "sptr"
; buffer : void* -> "sptr"
; byteOffset : ULONGLONG -> "sptr"
; length : DWORD -> "sptr"
; ※HSP3.7は int64 引数(64bit値渡し)に非対応です。
; ※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 "PROJECTEDFSLIB.dll"
#cfunc global PrjWriteFileData "PrjWriteFileData" sptr, var, sptr, int64, int
; res = PrjWriteFileData(namespaceVirtualizationContext, dataStreamId, buffer, byteOffset, length)
; namespaceVirtualizationContext : PRJ_NAMESPACE_VIRTUALIZATION_CONTEXT -> "sptr"
; dataStreamId : GUID* -> "var"
; buffer : void* -> "sptr"
; byteOffset : ULONGLONG -> "int64"
; length : DWORD -> "int"
; ※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。
; ※int64 引数の DLL 値渡しは x64 ランタイム(hsp3_64)のみ対応(x86 は未対応)。

; HRESULT PrjWriteFileData(PRJ_NAMESPACE_VIRTUALIZATION_CONTEXT namespaceVirtualizationContext, GUID* dataStreamId, void* buffer, ULONGLONG byteOffset, DWORD length)
#uselib "PROJECTEDFSLIB.dll"
#cfunc global PrjWriteFileData "PrjWriteFileData" intptr, var, intptr, int64, int
; res = PrjWriteFileData(namespaceVirtualizationContext, dataStreamId, buffer, byteOffset, length)
; namespaceVirtualizationContext : PRJ_NAMESPACE_VIRTUALIZATION_CONTEXT -> "intptr"
; dataStreamId : GUID* -> "var"
; buffer : void* -> "intptr"
; byteOffset : ULONGLONG -> "int64"
; length : DWORD -> "int"
; ※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 (
	projectedfslib = windows.NewLazySystemDLL("PROJECTEDFSLIB.dll")
	procPrjWriteFileData = projectedfslib.NewProc("PrjWriteFileData")
)

// namespaceVirtualizationContext (PRJ_NAMESPACE_VIRTUALIZATION_CONTEXT), dataStreamId (GUID*), buffer (void*), byteOffset (ULONGLONG), length (DWORD)
r1, _, err := procPrjWriteFileData.Call(
	uintptr(namespaceVirtualizationContext),
	uintptr(dataStreamId),
	uintptr(buffer),
	uintptr(byteOffset),
	uintptr(length),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function PrjWriteFileData(
  namespaceVirtualizationContext: THandle;   // PRJ_NAMESPACE_VIRTUALIZATION_CONTEXT
  dataStreamId: PGUID;   // GUID*
  buffer: Pointer;   // void*
  byteOffset: UInt64;   // ULONGLONG
  length: DWORD   // DWORD
): Integer; stdcall;
  external 'PROJECTEDFSLIB.dll' name 'PrjWriteFileData';

result := DllCall("PROJECTEDFSLIB\PrjWriteFileData"
    , "Ptr", namespaceVirtualizationContext   ; PRJ_NAMESPACE_VIRTUALIZATION_CONTEXT
    , "Ptr", dataStreamId   ; GUID*
    , "Ptr", buffer   ; void*
    , "Int64", byteOffset   ; ULONGLONG
    , "UInt", length   ; DWORD
    , "Int")   ; return: HRESULT

●PrjWriteFileData(namespaceVirtualizationContext, dataStreamId, buffer, byteOffset, length) = DLL("PROJECTEDFSLIB.dll", "int PrjWriteFileData(void*, void*, void*, qword, dword)")
# 呼び出し: PrjWriteFileData(namespaceVirtualizationContext, dataStreamId, buffer, byteOffset, length)
# namespaceVirtualizationContext : PRJ_NAMESPACE_VIRTUALIZATION_CONTEXT -> "void*"
# dataStreamId : GUID* -> "void*"
# buffer : void* -> "void*"
# byteOffset : ULONGLONG -> "qword"
# length : 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)。