MsiOpenDatabaseA

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

DWORD MsiOpenDatabaseA(
    LPCSTR szDatabasePath,
    LPCSTR szPersist,
    MSIHANDLE* phDatabase
);

<DllImport("msi.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function MsiOpenDatabaseA(
    <MarshalAs(UnmanagedType.LPStr)> szDatabasePath As String,   ' LPCSTR
    <MarshalAs(UnmanagedType.LPStr)> szPersist As String,   ' LPCSTR
    ByRef phDatabase As UInteger   ' MSIHANDLE* in/out
) As UInteger
End Function

' szDatabasePath : LPCSTR
' szPersist : LPCSTR
' phDatabase : MSIHANDLE* in/out
Declare PtrSafe Function MsiOpenDatabaseA Lib "msi" ( _
    ByVal szDatabasePath As String, _
    ByVal szPersist As String, _
    ByRef phDatabase 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

MsiOpenDatabaseA = ctypes.windll.msi.MsiOpenDatabaseA
MsiOpenDatabaseA.restype = wintypes.DWORD
MsiOpenDatabaseA.argtypes = [
    wintypes.LPCSTR,  # szDatabasePath : LPCSTR
    wintypes.LPCSTR,  # szPersist : LPCSTR
    ctypes.c_void_p,  # phDatabase : MSIHANDLE* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('msi.dll')
MsiOpenDatabaseA = Fiddle::Function.new(
  lib['MsiOpenDatabaseA'],
  [
    Fiddle::TYPE_VOIDP,  # szDatabasePath : LPCSTR
    Fiddle::TYPE_VOIDP,  # szPersist : LPCSTR
    Fiddle::TYPE_VOIDP,  # phDatabase : MSIHANDLE* in/out
  ],
  -Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("msi.dll", CharSet = CharSet.Ansi)]
public static extern uint MsiOpenDatabaseA([MarshalAs(UnmanagedType.LPStr)] string szDatabasePath, [MarshalAs(UnmanagedType.LPStr)] string szPersist, ref uint phDatabase);
"@
$api = Add-Type -MemberDefinition $sig -Name 'msi_MsiOpenDatabaseA' -Namespace Win32 -PassThru
# $api::MsiOpenDatabaseA(szDatabasePath, szPersist, phDatabase)

#uselib "msi.dll"
#func global MsiOpenDatabaseA "MsiOpenDatabaseA" sptr, sptr, sptr
; MsiOpenDatabaseA szDatabasePath, szPersist, phDatabase   ; 戻り値は stat
; szDatabasePath : LPCSTR -> "sptr"
; szPersist : LPCSTR -> "sptr"
; phDatabase : MSIHANDLE* 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 MsiOpenDatabaseA "MsiOpenDatabaseA" str, str, int
; res = MsiOpenDatabaseA(szDatabasePath, szPersist, phDatabase)
; szDatabasePath : LPCSTR -> "str"
; szPersist : LPCSTR -> "str"
; phDatabase : MSIHANDLE* in/out -> "int"

; DWORD MsiOpenDatabaseA(LPCSTR szDatabasePath, LPCSTR szPersist, MSIHANDLE* phDatabase)
#uselib "msi.dll"
#cfunc global MsiOpenDatabaseA "MsiOpenDatabaseA" str, str, int
; res = MsiOpenDatabaseA(szDatabasePath, szPersist, phDatabase)
; szDatabasePath : LPCSTR -> "str"
; szPersist : LPCSTR -> "str"
; phDatabase : MSIHANDLE* in/out -> "int"

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

var (
	msi = windows.NewLazySystemDLL("msi.dll")
	procMsiOpenDatabaseA = msi.NewProc("MsiOpenDatabaseA")
)

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

function MsiOpenDatabaseA(
  szDatabasePath: PAnsiChar;   // LPCSTR
  szPersist: PAnsiChar;   // LPCSTR
  phDatabase: Pointer   // MSIHANDLE* in/out
): DWORD; stdcall;
  external 'msi.dll' name 'MsiOpenDatabaseA';

result := DllCall("msi\MsiOpenDatabaseA"
    , "AStr", szDatabasePath   ; LPCSTR
    , "AStr", szPersist   ; LPCSTR
    , "Ptr", phDatabase   ; MSIHANDLE* in/out
    , "UInt")   ; return: DWORD

●MsiOpenDatabaseA(szDatabasePath, szPersist, phDatabase) = DLL("msi.dll", "dword MsiOpenDatabaseA(char*, char*, void*)")
# 呼び出し: MsiOpenDatabaseA(szDatabasePath, szPersist, phDatabase)
# szDatabasePath : LPCSTR -> "char*"
# szPersist : LPCSTR -> "char*"
# phDatabase : MSIHANDLE* 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)。