MsiSetPropertyA

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

DWORD MsiSetPropertyA(
    MSIHANDLE hInstall,
    LPCSTR szName,
    LPCSTR szValue
);

<DllImport("msi.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function MsiSetPropertyA(
    hInstall As UInteger,   ' MSIHANDLE
    <MarshalAs(UnmanagedType.LPStr)> szName As String,   ' LPCSTR
    <MarshalAs(UnmanagedType.LPStr)> szValue As String   ' LPCSTR
) As UInteger
End Function

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

import ctypes
from ctypes import wintypes

MsiSetPropertyA = ctypes.windll.msi.MsiSetPropertyA
MsiSetPropertyA.restype = wintypes.DWORD
MsiSetPropertyA.argtypes = [
    wintypes.DWORD,  # hInstall : MSIHANDLE
    wintypes.LPCSTR,  # szName : LPCSTR
    wintypes.LPCSTR,  # szValue : LPCSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('msi.dll')
MsiSetPropertyA = Fiddle::Function.new(
  lib['MsiSetPropertyA'],
  [
    -Fiddle::TYPE_INT,  # hInstall : MSIHANDLE
    Fiddle::TYPE_VOIDP,  # szName : LPCSTR
    Fiddle::TYPE_VOIDP,  # szValue : LPCSTR
  ],
  -Fiddle::TYPE_INT)

#[link(name = "msi")]
extern "system" {
    fn MsiSetPropertyA(
        hInstall: u32,  // MSIHANDLE
        szName: *const u8,  // LPCSTR
        szValue: *const u8  // LPCSTR
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

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

#uselib "msi.dll"
#func global MsiSetPropertyA "MsiSetPropertyA" sptr, sptr, sptr
; MsiSetPropertyA hInstall, szName, szValue   ; 戻り値は stat
; hInstall : MSIHANDLE -> "sptr"
; szName : LPCSTR -> "sptr"
; szValue : LPCSTR -> "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 MsiSetPropertyA "MsiSetPropertyA" int, str, str
; res = MsiSetPropertyA(hInstall, szName, szValue)
; hInstall : MSIHANDLE -> "int"
; szName : LPCSTR -> "str"
; szValue : LPCSTR -> "str"

; DWORD MsiSetPropertyA(MSIHANDLE hInstall, LPCSTR szName, LPCSTR szValue)
#uselib "msi.dll"
#cfunc global MsiSetPropertyA "MsiSetPropertyA" int, str, str
; res = MsiSetPropertyA(hInstall, szName, szValue)
; hInstall : MSIHANDLE -> "int"
; szName : LPCSTR -> "str"
; szValue : LPCSTR -> "str"

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

var (
	msi = windows.NewLazySystemDLL("msi.dll")
	procMsiSetPropertyA = msi.NewProc("MsiSetPropertyA")
)

// hInstall (MSIHANDLE), szName (LPCSTR), szValue (LPCSTR)
r1, _, err := procMsiSetPropertyA.Call(
	uintptr(hInstall),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(szName))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(szValue))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function MsiSetPropertyA(
  hInstall: DWORD;   // MSIHANDLE
  szName: PAnsiChar;   // LPCSTR
  szValue: PAnsiChar   // LPCSTR
): DWORD; stdcall;
  external 'msi.dll' name 'MsiSetPropertyA';

result := DllCall("msi\MsiSetPropertyA"
    , "UInt", hInstall   ; MSIHANDLE
    , "AStr", szName   ; LPCSTR
    , "AStr", szValue   ; LPCSTR
    , "UInt")   ; return: DWORD

●MsiSetPropertyA(hInstall, szName, szValue) = DLL("msi.dll", "dword MsiSetPropertyA(dword, char*, char*)")
# 呼び出し: MsiSetPropertyA(hInstall, szName, szValue)
# hInstall : MSIHANDLE -> "dword"
# szName : LPCSTR -> "char*"
# szValue : LPCSTR -> "char*"
# 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)。