MsiGetFeatureUsageA

// msi.dll  (ANSI / -A)
#include <windows.h>

DWORD MsiGetFeatureUsageA(
    LPCSTR szProduct,
    LPCSTR szFeature,
    DWORD* pdwUseCount,   // optional
    WORD* pwDateUsed   // optional
);

<DllImport("msi.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function MsiGetFeatureUsageA(
    <MarshalAs(UnmanagedType.LPStr)> szProduct As String,   ' LPCSTR
    <MarshalAs(UnmanagedType.LPStr)> szFeature As String,   ' LPCSTR
    pdwUseCount As IntPtr,   ' DWORD* optional, out
    pwDateUsed As IntPtr   ' WORD* optional, out
) As UInteger
End Function

' szProduct : LPCSTR
' szFeature : LPCSTR
' pdwUseCount : DWORD* optional, out
' pwDateUsed : WORD* optional, out
Declare PtrSafe Function MsiGetFeatureUsageA Lib "msi" ( _
    ByVal szProduct As String, _
    ByVal szFeature As String, _
    ByVal pdwUseCount As LongPtr, _
    ByVal pwDateUsed 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

MsiGetFeatureUsageA = ctypes.windll.msi.MsiGetFeatureUsageA
MsiGetFeatureUsageA.restype = wintypes.DWORD
MsiGetFeatureUsageA.argtypes = [
    wintypes.LPCSTR,  # szProduct : LPCSTR
    wintypes.LPCSTR,  # szFeature : LPCSTR
    ctypes.POINTER(wintypes.DWORD),  # pdwUseCount : DWORD* optional, out
    ctypes.POINTER(ctypes.c_ushort),  # pwDateUsed : WORD* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('msi.dll')
MsiGetFeatureUsageA = Fiddle::Function.new(
  lib['MsiGetFeatureUsageA'],
  [
    Fiddle::TYPE_VOIDP,  # szProduct : LPCSTR
    Fiddle::TYPE_VOIDP,  # szFeature : LPCSTR
    Fiddle::TYPE_VOIDP,  # pdwUseCount : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # pwDateUsed : WORD* optional, out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "msi")]
extern "system" {
    fn MsiGetFeatureUsageA(
        szProduct: *const u8,  // LPCSTR
        szFeature: *const u8,  // LPCSTR
        pdwUseCount: *mut u32,  // DWORD* optional, out
        pwDateUsed: *mut u16  // WORD* optional, out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("msi.dll", CharSet = CharSet.Ansi)]
public static extern uint MsiGetFeatureUsageA([MarshalAs(UnmanagedType.LPStr)] string szProduct, [MarshalAs(UnmanagedType.LPStr)] string szFeature, IntPtr pdwUseCount, IntPtr pwDateUsed);
"@
$api = Add-Type -MemberDefinition $sig -Name 'msi_MsiGetFeatureUsageA' -Namespace Win32 -PassThru
# $api::MsiGetFeatureUsageA(szProduct, szFeature, pdwUseCount, pwDateUsed)

#uselib "msi.dll"
#func global MsiGetFeatureUsageA "MsiGetFeatureUsageA" sptr, sptr, sptr, sptr
; MsiGetFeatureUsageA szProduct, szFeature, varptr(pdwUseCount), varptr(pwDateUsed)   ; 戻り値は stat
; szProduct : LPCSTR -> "sptr"
; szFeature : LPCSTR -> "sptr"
; pdwUseCount : DWORD* optional, out -> "sptr"
; pwDateUsed : WORD* optional, 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 "msi.dll"
#cfunc global MsiGetFeatureUsageA "MsiGetFeatureUsageA" str, str, var, var
; res = MsiGetFeatureUsageA(szProduct, szFeature, pdwUseCount, pwDateUsed)
; szProduct : LPCSTR -> "str"
; szFeature : LPCSTR -> "str"
; pdwUseCount : DWORD* optional, out -> "var"
; pwDateUsed : WORD* optional, 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 MsiGetFeatureUsageA(LPCSTR szProduct, LPCSTR szFeature, DWORD* pdwUseCount, WORD* pwDateUsed)
#uselib "msi.dll"
#cfunc global MsiGetFeatureUsageA "MsiGetFeatureUsageA" str, str, var, var
; res = MsiGetFeatureUsageA(szProduct, szFeature, pdwUseCount, pwDateUsed)
; szProduct : LPCSTR -> "str"
; szFeature : LPCSTR -> "str"
; pdwUseCount : DWORD* optional, out -> "var"
; pwDateUsed : WORD* optional, 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")
	procMsiGetFeatureUsageA = msi.NewProc("MsiGetFeatureUsageA")
)

// szProduct (LPCSTR), szFeature (LPCSTR), pdwUseCount (DWORD* optional, out), pwDateUsed (WORD* optional, out)
r1, _, err := procMsiGetFeatureUsageA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(szProduct))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(szFeature))),
	uintptr(pdwUseCount),
	uintptr(pwDateUsed),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function MsiGetFeatureUsageA(
  szProduct: PAnsiChar;   // LPCSTR
  szFeature: PAnsiChar;   // LPCSTR
  pdwUseCount: Pointer;   // DWORD* optional, out
  pwDateUsed: Pointer   // WORD* optional, out
): DWORD; stdcall;
  external 'msi.dll' name 'MsiGetFeatureUsageA';

result := DllCall("msi\MsiGetFeatureUsageA"
    , "AStr", szProduct   ; LPCSTR
    , "AStr", szFeature   ; LPCSTR
    , "Ptr", pdwUseCount   ; DWORD* optional, out
    , "Ptr", pwDateUsed   ; WORD* optional, out
    , "UInt")   ; return: DWORD

●MsiGetFeatureUsageA(szProduct, szFeature, pdwUseCount, pwDateUsed) = DLL("msi.dll", "dword MsiGetFeatureUsageA(char*, char*, void*, void*)")
# 呼び出し: MsiGetFeatureUsageA(szProduct, szFeature, pdwUseCount, pwDateUsed)
# szProduct : LPCSTR -> "char*"
# szFeature : LPCSTR -> "char*"
# pdwUseCount : DWORD* optional, out -> "void*"
# pwDateUsed : WORD* optional, 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)。