SQLInitEnumServers

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

HANDLE SQLInitEnumServers(
    LPWSTR pwchServerName,
    LPWSTR pwchInstanceName
);

<DllImport("odbcbcp.dll", ExactSpelling:=True)>
Public Shared Function SQLInitEnumServers(
    <MarshalAs(UnmanagedType.LPWStr)> pwchServerName As String,   ' LPWSTR
    <MarshalAs(UnmanagedType.LPWStr)> pwchInstanceName As String   ' LPWSTR
) As IntPtr
End Function

' pwchServerName : LPWSTR
' pwchInstanceName : LPWSTR
Declare PtrSafe Function SQLInitEnumServers Lib "odbcbcp" ( _
    ByVal pwchServerName As LongPtr, _
    ByVal pwchInstanceName As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SQLInitEnumServers = ctypes.windll.odbcbcp.SQLInitEnumServers
SQLInitEnumServers.restype = ctypes.c_void_p
SQLInitEnumServers.argtypes = [
    wintypes.LPCWSTR,  # pwchServerName : LPWSTR
    wintypes.LPCWSTR,  # pwchInstanceName : LPWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('odbcbcp.dll')
SQLInitEnumServers = Fiddle::Function.new(
  lib['SQLInitEnumServers'],
  [
    Fiddle::TYPE_VOIDP,  # pwchServerName : LPWSTR
    Fiddle::TYPE_VOIDP,  # pwchInstanceName : LPWSTR
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "odbcbcp")]
extern "system" {
    fn SQLInitEnumServers(
        pwchServerName: *mut u16,  // LPWSTR
        pwchInstanceName: *mut u16  // LPWSTR
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("odbcbcp.dll")]
public static extern IntPtr SQLInitEnumServers([MarshalAs(UnmanagedType.LPWStr)] string pwchServerName, [MarshalAs(UnmanagedType.LPWStr)] string pwchInstanceName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'odbcbcp_SQLInitEnumServers' -Namespace Win32 -PassThru
# $api::SQLInitEnumServers(pwchServerName, pwchInstanceName)

#uselib "odbcbcp.dll"
#func global SQLInitEnumServers "SQLInitEnumServers" sptr, sptr
; SQLInitEnumServers pwchServerName, pwchInstanceName   ; 戻り値は stat
; pwchServerName : LPWSTR -> "sptr"
; pwchInstanceName : LPWSTR -> "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 "odbcbcp.dll"
#cfunc global SQLInitEnumServers "SQLInitEnumServers" wstr, wstr
; res = SQLInitEnumServers(pwchServerName, pwchInstanceName)
; pwchServerName : LPWSTR -> "wstr"
; pwchInstanceName : LPWSTR -> "wstr"

; HANDLE SQLInitEnumServers(LPWSTR pwchServerName, LPWSTR pwchInstanceName)
#uselib "odbcbcp.dll"
#cfunc global SQLInitEnumServers "SQLInitEnumServers" wstr, wstr
; res = SQLInitEnumServers(pwchServerName, pwchInstanceName)
; pwchServerName : LPWSTR -> "wstr"
; pwchInstanceName : LPWSTR -> "wstr"

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

var (
	odbcbcp = windows.NewLazySystemDLL("odbcbcp.dll")
	procSQLInitEnumServers = odbcbcp.NewProc("SQLInitEnumServers")
)

// pwchServerName (LPWSTR), pwchInstanceName (LPWSTR)
r1, _, err := procSQLInitEnumServers.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwchServerName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwchInstanceName))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HANDLE

function SQLInitEnumServers(
  pwchServerName: PWideChar;   // LPWSTR
  pwchInstanceName: PWideChar   // LPWSTR
): THandle; stdcall;
  external 'odbcbcp.dll' name 'SQLInitEnumServers';

result := DllCall("odbcbcp\SQLInitEnumServers"
    , "WStr", pwchServerName   ; LPWSTR
    , "WStr", pwchInstanceName   ; LPWSTR
    , "Ptr")   ; return: HANDLE

●SQLInitEnumServers(pwchServerName, pwchInstanceName) = DLL("odbcbcp.dll", "void* SQLInitEnumServers(char*, char*)")
# 呼び出し: SQLInitEnumServers(pwchServerName, pwchInstanceName)
# pwchServerName : LPWSTR -> "char*"
# pwchInstanceName : LPWSTR -> "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)。