SQLGetInfo

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

SHORT SQLGetInfo(
    void* ConnectionHandle,
    WORD InfoType,
    void* InfoValue,   // optional
    SHORT BufferLength,
    SHORT* StringLengthPtr   // optional
);

<DllImport("ODBC32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SQLGetInfo(
    ConnectionHandle As IntPtr,   ' void* in/out
    InfoType As UShort,   ' WORD
    InfoValue As IntPtr,   ' void* optional, out
    BufferLength As Short,   ' SHORT
    StringLengthPtr As IntPtr   ' SHORT* optional, out
) As Short
End Function

' ConnectionHandle : void* in/out
' InfoType : WORD
' InfoValue : void* optional, out
' BufferLength : SHORT
' StringLengthPtr : SHORT* optional, out
Declare PtrSafe Function SQLGetInfo Lib "odbc32" ( _
    ByVal ConnectionHandle As LongPtr, _
    ByVal InfoType As Integer, _
    ByVal InfoValue As LongPtr, _
    ByVal BufferLength As Integer, _
    ByVal StringLengthPtr 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

SQLGetInfo = ctypes.windll.odbc32.SQLGetInfo
SQLGetInfo.restype = ctypes.c_short
SQLGetInfo.argtypes = [
    ctypes.POINTER(None),  # ConnectionHandle : void* in/out
    ctypes.c_ushort,  # InfoType : WORD
    ctypes.POINTER(None),  # InfoValue : void* optional, out
    ctypes.c_short,  # BufferLength : SHORT
    ctypes.POINTER(ctypes.c_short),  # StringLengthPtr : SHORT* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLGetInfo = Fiddle::Function.new(
  lib['SQLGetInfo'],
  [
    Fiddle::TYPE_VOIDP,  # ConnectionHandle : void* in/out
    -Fiddle::TYPE_SHORT,  # InfoType : WORD
    Fiddle::TYPE_VOIDP,  # InfoValue : void* optional, out
    Fiddle::TYPE_SHORT,  # BufferLength : SHORT
    Fiddle::TYPE_VOIDP,  # StringLengthPtr : SHORT* optional, out
  ],
  Fiddle::TYPE_SHORT)

#[link(name = "odbc32")]
extern "system" {
    fn SQLGetInfo(
        ConnectionHandle: *mut (),  // void* in/out
        InfoType: u16,  // WORD
        InfoValue: *mut (),  // void* optional, out
        BufferLength: i16,  // SHORT
        StringLengthPtr: *mut i16  // SHORT* optional, out
    ) -> i16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ODBC32.dll", CharSet = CharSet.Ansi)]
public static extern short SQLGetInfo(IntPtr ConnectionHandle, ushort InfoType, IntPtr InfoValue, short BufferLength, IntPtr StringLengthPtr);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLGetInfo' -Namespace Win32 -PassThru
# $api::SQLGetInfo(ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr)

#uselib "ODBC32.dll"
#func global SQLGetInfo "SQLGetInfo" sptr, sptr, sptr, sptr, sptr
; SQLGetInfo ConnectionHandle, InfoType, InfoValue, BufferLength, varptr(StringLengthPtr)   ; 戻り値は stat
; ConnectionHandle : void* in/out -> "sptr"
; InfoType : WORD -> "sptr"
; InfoValue : void* optional, out -> "sptr"
; BufferLength : SHORT -> "sptr"
; StringLengthPtr : SHORT* optional, 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 SQLGetInfo "SQLGetInfo" sptr, int, sptr, int, var
; res = SQLGetInfo(ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr)
; ConnectionHandle : void* in/out -> "sptr"
; InfoType : WORD -> "int"
; InfoValue : void* optional, out -> "sptr"
; BufferLength : SHORT -> "int"
; StringLengthPtr : SHORT* optional, out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; SHORT SQLGetInfo(void* ConnectionHandle, WORD InfoType, void* InfoValue, SHORT BufferLength, SHORT* StringLengthPtr)
#uselib "ODBC32.dll"
#cfunc global SQLGetInfo "SQLGetInfo" intptr, int, intptr, int, var
; res = SQLGetInfo(ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr)
; ConnectionHandle : void* in/out -> "intptr"
; InfoType : WORD -> "int"
; InfoValue : void* optional, out -> "intptr"
; BufferLength : SHORT -> "int"
; StringLengthPtr : SHORT* optional, out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	odbc32 = windows.NewLazySystemDLL("ODBC32.dll")
	procSQLGetInfo = odbc32.NewProc("SQLGetInfo")
)

// ConnectionHandle (void* in/out), InfoType (WORD), InfoValue (void* optional, out), BufferLength (SHORT), StringLengthPtr (SHORT* optional, out)
r1, _, err := procSQLGetInfo.Call(
	uintptr(ConnectionHandle),
	uintptr(InfoType),
	uintptr(InfoValue),
	uintptr(BufferLength),
	uintptr(StringLengthPtr),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SHORT

function SQLGetInfo(
  ConnectionHandle: Pointer;   // void* in/out
  InfoType: Word;   // WORD
  InfoValue: Pointer;   // void* optional, out
  BufferLength: Smallint;   // SHORT
  StringLengthPtr: Pointer   // SHORT* optional, out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLGetInfo';

result := DllCall("ODBC32\SQLGetInfo"
    , "Ptr", ConnectionHandle   ; void* in/out
    , "UShort", InfoType   ; WORD
    , "Ptr", InfoValue   ; void* optional, out
    , "Short", BufferLength   ; SHORT
    , "Ptr", StringLengthPtr   ; SHORT* optional, out
    , "Short")   ; return: SHORT

●SQLGetInfo(ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr) = DLL("ODBC32.dll", "int SQLGetInfo(void*, int, void*, int, void*)")
# 呼び出し: SQLGetInfo(ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr)
# ConnectionHandle : void* in/out -> "void*"
# InfoType : WORD -> "int"
# InfoValue : void* optional, out -> "void*"
# BufferLength : SHORT -> "int"
# StringLengthPtr : SHORT* optional, 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)。