MsiProvideAssemblyW

// msi.dll  (Unicode / -W)
#include <windows.h>

DWORD MsiProvideAssemblyW(
    LPCWSTR szAssemblyName,
    LPCWSTR szAppContext,   // optional
    DWORD dwInstallMode,
    MSIASSEMBLYINFO dwAssemblyInfo,
    LPWSTR lpPathBuf,   // optional
    DWORD* pcchPathBuf   // optional
);

<DllImport("msi.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function MsiProvideAssemblyW(
    <MarshalAs(UnmanagedType.LPWStr)> szAssemblyName As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> szAppContext As String,   ' LPCWSTR optional
    dwInstallMode As UInteger,   ' DWORD
    dwAssemblyInfo As UInteger,   ' MSIASSEMBLYINFO
    <MarshalAs(UnmanagedType.LPWStr)> lpPathBuf As System.Text.StringBuilder,   ' LPWSTR optional, out
    pcchPathBuf As IntPtr   ' DWORD* optional, in/out
) As UInteger
End Function

' szAssemblyName : LPCWSTR
' szAppContext : LPCWSTR optional
' dwInstallMode : DWORD
' dwAssemblyInfo : MSIASSEMBLYINFO
' lpPathBuf : LPWSTR optional, out
' pcchPathBuf : DWORD* optional, in/out
Declare PtrSafe Function MsiProvideAssemblyW Lib "msi" ( _
    ByVal szAssemblyName As LongPtr, _
    ByVal szAppContext As LongPtr, _
    ByVal dwInstallMode As Long, _
    ByVal dwAssemblyInfo As Long, _
    ByVal lpPathBuf As LongPtr, _
    ByVal pcchPathBuf As LongPtr) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

MsiProvideAssemblyW = ctypes.windll.msi.MsiProvideAssemblyW
MsiProvideAssemblyW.restype = wintypes.DWORD
MsiProvideAssemblyW.argtypes = [
    wintypes.LPCWSTR,  # szAssemblyName : LPCWSTR
    wintypes.LPCWSTR,  # szAppContext : LPCWSTR optional
    wintypes.DWORD,  # dwInstallMode : DWORD
    wintypes.DWORD,  # dwAssemblyInfo : MSIASSEMBLYINFO
    wintypes.LPWSTR,  # lpPathBuf : LPWSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchPathBuf : DWORD* optional, in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('msi.dll')
MsiProvideAssemblyW = Fiddle::Function.new(
  lib['MsiProvideAssemblyW'],
  [
    Fiddle::TYPE_VOIDP,  # szAssemblyName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # szAppContext : LPCWSTR optional
    -Fiddle::TYPE_INT,  # dwInstallMode : DWORD
    -Fiddle::TYPE_INT,  # dwAssemblyInfo : MSIASSEMBLYINFO
    Fiddle::TYPE_VOIDP,  # lpPathBuf : LPWSTR optional, out
    Fiddle::TYPE_VOIDP,  # pcchPathBuf : DWORD* optional, in/out
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "msi")]
extern "system" {
    fn MsiProvideAssemblyW(
        szAssemblyName: *const u16,  // LPCWSTR
        szAppContext: *const u16,  // LPCWSTR optional
        dwInstallMode: u32,  // DWORD
        dwAssemblyInfo: u32,  // MSIASSEMBLYINFO
        lpPathBuf: *mut u16,  // LPWSTR optional, out
        pcchPathBuf: *mut u32  // DWORD* optional, in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("msi.dll", CharSet = CharSet.Unicode)]
public static extern uint MsiProvideAssemblyW([MarshalAs(UnmanagedType.LPWStr)] string szAssemblyName, [MarshalAs(UnmanagedType.LPWStr)] string szAppContext, uint dwInstallMode, uint dwAssemblyInfo, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpPathBuf, IntPtr pcchPathBuf);
"@
$api = Add-Type -MemberDefinition $sig -Name 'msi_MsiProvideAssemblyW' -Namespace Win32 -PassThru
# $api::MsiProvideAssemblyW(szAssemblyName, szAppContext, dwInstallMode, dwAssemblyInfo, lpPathBuf, pcchPathBuf)

#uselib "msi.dll"
#func global MsiProvideAssemblyW "MsiProvideAssemblyW" wptr, wptr, wptr, wptr, wptr, wptr
; MsiProvideAssemblyW szAssemblyName, szAppContext, dwInstallMode, dwAssemblyInfo, varptr(lpPathBuf), varptr(pcchPathBuf)   ; 戻り値は stat
; szAssemblyName : LPCWSTR -> "wptr"
; szAppContext : LPCWSTR optional -> "wptr"
; dwInstallMode : DWORD -> "wptr"
; dwAssemblyInfo : MSIASSEMBLYINFO -> "wptr"
; lpPathBuf : LPWSTR optional, out -> "wptr"
; pcchPathBuf : DWORD* optional, in/out -> "wptr"
; ※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 "msi.dll"
#cfunc global MsiProvideAssemblyW "MsiProvideAssemblyW" wstr, wstr, int, int, var, var
; res = MsiProvideAssemblyW(szAssemblyName, szAppContext, dwInstallMode, dwAssemblyInfo, lpPathBuf, pcchPathBuf)
; szAssemblyName : LPCWSTR -> "wstr"
; szAppContext : LPCWSTR optional -> "wstr"
; dwInstallMode : DWORD -> "int"
; dwAssemblyInfo : MSIASSEMBLYINFO -> "int"
; lpPathBuf : LPWSTR optional, out -> "var"
; pcchPathBuf : DWORD* optional, 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。

; DWORD MsiProvideAssemblyW(LPCWSTR szAssemblyName, LPCWSTR szAppContext, DWORD dwInstallMode, MSIASSEMBLYINFO dwAssemblyInfo, LPWSTR lpPathBuf, DWORD* pcchPathBuf)
#uselib "msi.dll"
#cfunc global MsiProvideAssemblyW "MsiProvideAssemblyW" wstr, wstr, int, int, var, var
; res = MsiProvideAssemblyW(szAssemblyName, szAppContext, dwInstallMode, dwAssemblyInfo, lpPathBuf, pcchPathBuf)
; szAssemblyName : LPCWSTR -> "wstr"
; szAppContext : LPCWSTR optional -> "wstr"
; dwInstallMode : DWORD -> "int"
; dwAssemblyInfo : MSIASSEMBLYINFO -> "int"
; lpPathBuf : LPWSTR optional, out -> "var"
; pcchPathBuf : DWORD* optional, 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 (
	msi = windows.NewLazySystemDLL("msi.dll")
	procMsiProvideAssemblyW = msi.NewProc("MsiProvideAssemblyW")
)

// szAssemblyName (LPCWSTR), szAppContext (LPCWSTR optional), dwInstallMode (DWORD), dwAssemblyInfo (MSIASSEMBLYINFO), lpPathBuf (LPWSTR optional, out), pcchPathBuf (DWORD* optional, in/out)
r1, _, err := procMsiProvideAssemblyW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szAssemblyName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szAppContext))),
	uintptr(dwInstallMode),
	uintptr(dwAssemblyInfo),
	uintptr(lpPathBuf),
	uintptr(pcchPathBuf),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function MsiProvideAssemblyW(
  szAssemblyName: PWideChar;   // LPCWSTR
  szAppContext: PWideChar;   // LPCWSTR optional
  dwInstallMode: DWORD;   // DWORD
  dwAssemblyInfo: DWORD;   // MSIASSEMBLYINFO
  lpPathBuf: PWideChar;   // LPWSTR optional, out
  pcchPathBuf: Pointer   // DWORD* optional, in/out
): DWORD; stdcall;
  external 'msi.dll' name 'MsiProvideAssemblyW';

result := DllCall("msi\MsiProvideAssemblyW"
    , "WStr", szAssemblyName   ; LPCWSTR
    , "WStr", szAppContext   ; LPCWSTR optional
    , "UInt", dwInstallMode   ; DWORD
    , "UInt", dwAssemblyInfo   ; MSIASSEMBLYINFO
    , "Ptr", lpPathBuf   ; LPWSTR optional, out
    , "Ptr", pcchPathBuf   ; DWORD* optional, in/out
    , "UInt")   ; return: DWORD

●MsiProvideAssemblyW(szAssemblyName, szAppContext, dwInstallMode, dwAssemblyInfo, lpPathBuf, pcchPathBuf) = DLL("msi.dll", "dword MsiProvideAssemblyW(char*, char*, dword, dword, char*, void*)")
# 呼び出し: MsiProvideAssemblyW(szAssemblyName, szAppContext, dwInstallMode, dwAssemblyInfo, lpPathBuf, pcchPathBuf)
# szAssemblyName : LPCWSTR -> "char*"
# szAppContext : LPCWSTR optional -> "char*"
# dwInstallMode : DWORD -> "dword"
# dwAssemblyInfo : MSIASSEMBLYINFO -> "dword"
# lpPathBuf : LPWSTR optional, out -> "char*"
# pcchPathBuf : DWORD* optional, 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。