MsiGetFeatureValidStatesA

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

DWORD MsiGetFeatureValidStatesA(
    MSIHANDLE hInstall,
    LPCSTR szFeature,
    DWORD* lpInstallStates
);

<DllImport("msi.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function MsiGetFeatureValidStatesA(
    hInstall As UInteger,   ' MSIHANDLE
    <MarshalAs(UnmanagedType.LPStr)> szFeature As String,   ' LPCSTR
    ByRef lpInstallStates As UInteger   ' DWORD* in/out
) As UInteger
End Function

' hInstall : MSIHANDLE
' szFeature : LPCSTR
' lpInstallStates : DWORD* in/out
Declare PtrSafe Function MsiGetFeatureValidStatesA Lib "msi" ( _
    ByVal hInstall As Long, _
    ByVal szFeature As String, _
    ByRef lpInstallStates 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

MsiGetFeatureValidStatesA = ctypes.windll.msi.MsiGetFeatureValidStatesA
MsiGetFeatureValidStatesA.restype = wintypes.DWORD
MsiGetFeatureValidStatesA.argtypes = [
    wintypes.DWORD,  # hInstall : MSIHANDLE
    wintypes.LPCSTR,  # szFeature : LPCSTR
    ctypes.POINTER(wintypes.DWORD),  # lpInstallStates : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('msi.dll')
MsiGetFeatureValidStatesA = Fiddle::Function.new(
  lib['MsiGetFeatureValidStatesA'],
  [
    -Fiddle::TYPE_INT,  # hInstall : MSIHANDLE
    Fiddle::TYPE_VOIDP,  # szFeature : LPCSTR
    Fiddle::TYPE_VOIDP,  # lpInstallStates : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "msi")]
extern "system" {
    fn MsiGetFeatureValidStatesA(
        hInstall: u32,  // MSIHANDLE
        szFeature: *const u8,  // LPCSTR
        lpInstallStates: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("msi.dll", CharSet = CharSet.Ansi)]
public static extern uint MsiGetFeatureValidStatesA(uint hInstall, [MarshalAs(UnmanagedType.LPStr)] string szFeature, ref uint lpInstallStates);
"@
$api = Add-Type -MemberDefinition $sig -Name 'msi_MsiGetFeatureValidStatesA' -Namespace Win32 -PassThru
# $api::MsiGetFeatureValidStatesA(hInstall, szFeature, lpInstallStates)

#uselib "msi.dll"
#func global MsiGetFeatureValidStatesA "MsiGetFeatureValidStatesA" sptr, sptr, sptr
; MsiGetFeatureValidStatesA hInstall, szFeature, varptr(lpInstallStates)   ; 戻り値は stat
; hInstall : MSIHANDLE -> "sptr"
; szFeature : LPCSTR -> "sptr"
; lpInstallStates : DWORD* in/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 MsiGetFeatureValidStatesA "MsiGetFeatureValidStatesA" int, str, var
; res = MsiGetFeatureValidStatesA(hInstall, szFeature, lpInstallStates)
; hInstall : MSIHANDLE -> "int"
; szFeature : LPCSTR -> "str"
; lpInstallStates : DWORD* 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 MsiGetFeatureValidStatesA(MSIHANDLE hInstall, LPCSTR szFeature, DWORD* lpInstallStates)
#uselib "msi.dll"
#cfunc global MsiGetFeatureValidStatesA "MsiGetFeatureValidStatesA" int, str, var
; res = MsiGetFeatureValidStatesA(hInstall, szFeature, lpInstallStates)
; hInstall : MSIHANDLE -> "int"
; szFeature : LPCSTR -> "str"
; lpInstallStates : DWORD* 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")
	procMsiGetFeatureValidStatesA = msi.NewProc("MsiGetFeatureValidStatesA")
)

// hInstall (MSIHANDLE), szFeature (LPCSTR), lpInstallStates (DWORD* in/out)
r1, _, err := procMsiGetFeatureValidStatesA.Call(
	uintptr(hInstall),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(szFeature))),
	uintptr(lpInstallStates),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function MsiGetFeatureValidStatesA(
  hInstall: DWORD;   // MSIHANDLE
  szFeature: PAnsiChar;   // LPCSTR
  lpInstallStates: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'msi.dll' name 'MsiGetFeatureValidStatesA';

result := DllCall("msi\MsiGetFeatureValidStatesA"
    , "UInt", hInstall   ; MSIHANDLE
    , "AStr", szFeature   ; LPCSTR
    , "Ptr", lpInstallStates   ; DWORD* in/out
    , "UInt")   ; return: DWORD

●MsiGetFeatureValidStatesA(hInstall, szFeature, lpInstallStates) = DLL("msi.dll", "dword MsiGetFeatureValidStatesA(dword, char*, void*)")
# 呼び出し: MsiGetFeatureValidStatesA(hInstall, szFeature, lpInstallStates)
# hInstall : MSIHANDLE -> "dword"
# szFeature : LPCSTR -> "char*"
# lpInstallStates : DWORD* 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)。