MsiGetLanguage

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

WORD MsiGetLanguage(
    MSIHANDLE hInstall
);

<DllImport("msi.dll", ExactSpelling:=True)>
Public Shared Function MsiGetLanguage(
    hInstall As UInteger   ' MSIHANDLE
) As UShort
End Function

' hInstall : MSIHANDLE
Declare PtrSafe Function MsiGetLanguage Lib "msi" ( _
    ByVal hInstall As Long) As Integer
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

MsiGetLanguage = ctypes.windll.msi.MsiGetLanguage
MsiGetLanguage.restype = ctypes.c_ushort
MsiGetLanguage.argtypes = [
    wintypes.DWORD,  # hInstall : MSIHANDLE
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('msi.dll')
MsiGetLanguage = Fiddle::Function.new(
  lib['MsiGetLanguage'],
  [
    -Fiddle::TYPE_INT,  # hInstall : MSIHANDLE
  ],
  -Fiddle::TYPE_SHORT)

#[link(name = "msi")]
extern "system" {
    fn MsiGetLanguage(
        hInstall: u32  // MSIHANDLE
    ) -> u16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("msi.dll")]
public static extern ushort MsiGetLanguage(uint hInstall);
"@
$api = Add-Type -MemberDefinition $sig -Name 'msi_MsiGetLanguage' -Namespace Win32 -PassThru
# $api::MsiGetLanguage(hInstall)

#uselib "msi.dll"
#func global MsiGetLanguage "MsiGetLanguage" sptr
; MsiGetLanguage hInstall   ; 戻り値は stat
; hInstall : MSIHANDLE -> "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 MsiGetLanguage "MsiGetLanguage" int
; res = MsiGetLanguage(hInstall)
; hInstall : MSIHANDLE -> "int"

; WORD MsiGetLanguage(MSIHANDLE hInstall)
#uselib "msi.dll"
#cfunc global MsiGetLanguage "MsiGetLanguage" int
; res = MsiGetLanguage(hInstall)
; hInstall : MSIHANDLE -> "int"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	msi = windows.NewLazySystemDLL("msi.dll")
	procMsiGetLanguage = msi.NewProc("MsiGetLanguage")
)

// hInstall (MSIHANDLE)
r1, _, err := procMsiGetLanguage.Call(
	uintptr(hInstall),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WORD

function MsiGetLanguage(
  hInstall: DWORD   // MSIHANDLE
): Word; stdcall;
  external 'msi.dll' name 'MsiGetLanguage';

result := DllCall("msi\MsiGetLanguage"
    , "UInt", hInstall   ; MSIHANDLE
    , "UShort")   ; return: WORD

●MsiGetLanguage(hInstall) = DLL("msi.dll", "int MsiGetLanguage(dword)")
# 呼び出し: MsiGetLanguage(hInstall)
# hInstall : MSIHANDLE -> "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)。