MsiGetActiveDatabase

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

MSIHANDLE MsiGetActiveDatabase(
    MSIHANDLE hInstall
);

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

' hInstall : MSIHANDLE
Declare PtrSafe Function MsiGetActiveDatabase Lib "msi" ( _
    ByVal hInstall 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

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

require 'fiddle'
require 'fiddle/import'

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

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

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

#uselib "msi.dll"
#func global MsiGetActiveDatabase "MsiGetActiveDatabase" sptr
; MsiGetActiveDatabase 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 MsiGetActiveDatabase "MsiGetActiveDatabase" int
; res = MsiGetActiveDatabase(hInstall)
; hInstall : MSIHANDLE -> "int"

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

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

var (
	msi = windows.NewLazySystemDLL("msi.dll")
	procMsiGetActiveDatabase = msi.NewProc("MsiGetActiveDatabase")
)

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

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

result := DllCall("msi\MsiGetActiveDatabase"
    , "UInt", hInstall   ; MSIHANDLE
    , "UInt")   ; return: MSIHANDLE

●MsiGetActiveDatabase(hInstall) = DLL("msi.dll", "dword MsiGetActiveDatabase(dword)")
# 呼び出し: MsiGetActiveDatabase(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)。