SQLGetConnectOptionA

// ODBC32.dll  (ANSI / -A)
#include <windows.h>

SHORT SQLGetConnectOptionA(
    void* hdbc,
    WORD fOption,
    void* pvParam
);

<DllImport("ODBC32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SQLGetConnectOptionA(
    hdbc As IntPtr,   ' void* in/out
    fOption As UShort,   ' WORD
    pvParam As IntPtr   ' void* in/out
) As Short
End Function

' hdbc : void* in/out
' fOption : WORD
' pvParam : void* in/out
Declare PtrSafe Function SQLGetConnectOptionA Lib "odbc32" ( _
    ByVal hdbc As LongPtr, _
    ByVal fOption As Integer, _
    ByVal pvParam As LongPtr) As Integer
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SQLGetConnectOptionA = ctypes.windll.odbc32.SQLGetConnectOptionA
SQLGetConnectOptionA.restype = ctypes.c_short
SQLGetConnectOptionA.argtypes = [
    ctypes.POINTER(None),  # hdbc : void* in/out
    ctypes.c_ushort,  # fOption : WORD
    ctypes.POINTER(None),  # pvParam : void* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLGetConnectOptionA = Fiddle::Function.new(
  lib['SQLGetConnectOptionA'],
  [
    Fiddle::TYPE_VOIDP,  # hdbc : void* in/out
    -Fiddle::TYPE_SHORT,  # fOption : WORD
    Fiddle::TYPE_VOIDP,  # pvParam : void* in/out
  ],
  Fiddle::TYPE_SHORT)

#[link(name = "odbc32")]
extern "system" {
    fn SQLGetConnectOptionA(
        hdbc: *mut (),  // void* in/out
        fOption: u16,  // WORD
        pvParam: *mut ()  // void* in/out
    ) -> i16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ODBC32.dll", CharSet = CharSet.Ansi)]
public static extern short SQLGetConnectOptionA(IntPtr hdbc, ushort fOption, IntPtr pvParam);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLGetConnectOptionA' -Namespace Win32 -PassThru
# $api::SQLGetConnectOptionA(hdbc, fOption, pvParam)

#uselib "ODBC32.dll"
#func global SQLGetConnectOptionA "SQLGetConnectOptionA" sptr, sptr, sptr
; SQLGetConnectOptionA hdbc, fOption, pvParam   ; 戻り値は stat
; hdbc : void* in/out -> "sptr"
; fOption : WORD -> "sptr"
; pvParam : void* 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 "ODBC32.dll"
#cfunc global SQLGetConnectOptionA "SQLGetConnectOptionA" sptr, int, sptr
; res = SQLGetConnectOptionA(hdbc, fOption, pvParam)
; hdbc : void* in/out -> "sptr"
; fOption : WORD -> "int"
; pvParam : void* in/out -> "sptr"

; SHORT SQLGetConnectOptionA(void* hdbc, WORD fOption, void* pvParam)
#uselib "ODBC32.dll"
#cfunc global SQLGetConnectOptionA "SQLGetConnectOptionA" intptr, int, intptr
; res = SQLGetConnectOptionA(hdbc, fOption, pvParam)
; hdbc : void* in/out -> "intptr"
; fOption : WORD -> "int"
; pvParam : void* in/out -> "intptr"

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

var (
	odbc32 = windows.NewLazySystemDLL("ODBC32.dll")
	procSQLGetConnectOptionA = odbc32.NewProc("SQLGetConnectOptionA")
)

// hdbc (void* in/out), fOption (WORD), pvParam (void* in/out)
r1, _, err := procSQLGetConnectOptionA.Call(
	uintptr(hdbc),
	uintptr(fOption),
	uintptr(pvParam),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SHORT

function SQLGetConnectOptionA(
  hdbc: Pointer;   // void* in/out
  fOption: Word;   // WORD
  pvParam: Pointer   // void* in/out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLGetConnectOptionA';

result := DllCall("ODBC32\SQLGetConnectOptionA"
    , "Ptr", hdbc   ; void* in/out
    , "UShort", fOption   ; WORD
    , "Ptr", pvParam   ; void* in/out
    , "Short")   ; return: SHORT

●SQLGetConnectOptionA(hdbc, fOption, pvParam) = DLL("ODBC32.dll", "int SQLGetConnectOptionA(void*, int, void*)")
# 呼び出し: SQLGetConnectOptionA(hdbc, fOption, pvParam)
# hdbc : void* in/out -> "void*"
# fOption : WORD -> "int"
# pvParam : void* 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)。