SQLGetFunctions

// ODBC32.dll
#include <windows.h>

SHORT SQLGetFunctions(
    void* ConnectionHandle,
    WORD FunctionId,
    WORD* Supported   // optional
);

<DllImport("ODBC32.dll", ExactSpelling:=True)>
Public Shared Function SQLGetFunctions(
    ConnectionHandle As IntPtr,   ' void* in/out
    FunctionId As UShort,   ' WORD
    Supported As IntPtr   ' WORD* optional, out
) As Short
End Function

' ConnectionHandle : void* in/out
' FunctionId : WORD
' Supported : WORD* optional, out
Declare PtrSafe Function SQLGetFunctions Lib "odbc32" ( _
    ByVal ConnectionHandle As LongPtr, _
    ByVal FunctionId As Integer, _
    ByVal Supported 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

SQLGetFunctions = ctypes.windll.odbc32.SQLGetFunctions
SQLGetFunctions.restype = ctypes.c_short
SQLGetFunctions.argtypes = [
    ctypes.POINTER(None),  # ConnectionHandle : void* in/out
    ctypes.c_ushort,  # FunctionId : WORD
    ctypes.POINTER(ctypes.c_ushort),  # Supported : WORD* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLGetFunctions = Fiddle::Function.new(
  lib['SQLGetFunctions'],
  [
    Fiddle::TYPE_VOIDP,  # ConnectionHandle : void* in/out
    -Fiddle::TYPE_SHORT,  # FunctionId : WORD
    Fiddle::TYPE_VOIDP,  # Supported : WORD* optional, out
  ],
  Fiddle::TYPE_SHORT)

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

$sig = @"
[DllImport("ODBC32.dll")]
public static extern short SQLGetFunctions(IntPtr ConnectionHandle, ushort FunctionId, IntPtr Supported);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLGetFunctions' -Namespace Win32 -PassThru
# $api::SQLGetFunctions(ConnectionHandle, FunctionId, Supported)

#uselib "ODBC32.dll"
#func global SQLGetFunctions "SQLGetFunctions" sptr, sptr, sptr
; SQLGetFunctions ConnectionHandle, FunctionId, varptr(Supported)   ; 戻り値は stat
; ConnectionHandle : void* in/out -> "sptr"
; FunctionId : WORD -> "sptr"
; Supported : WORD* 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 SQLGetFunctions "SQLGetFunctions" sptr, int, var
; res = SQLGetFunctions(ConnectionHandle, FunctionId, Supported)
; ConnectionHandle : void* in/out -> "sptr"
; FunctionId : WORD -> "int"
; Supported : WORD* 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 SQLGetFunctions(void* ConnectionHandle, WORD FunctionId, WORD* Supported)
#uselib "ODBC32.dll"
#cfunc global SQLGetFunctions "SQLGetFunctions" intptr, int, var
; res = SQLGetFunctions(ConnectionHandle, FunctionId, Supported)
; ConnectionHandle : void* in/out -> "intptr"
; FunctionId : WORD -> "int"
; Supported : WORD* 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")
	procSQLGetFunctions = odbc32.NewProc("SQLGetFunctions")
)

// ConnectionHandle (void* in/out), FunctionId (WORD), Supported (WORD* optional, out)
r1, _, err := procSQLGetFunctions.Call(
	uintptr(ConnectionHandle),
	uintptr(FunctionId),
	uintptr(Supported),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SHORT

function SQLGetFunctions(
  ConnectionHandle: Pointer;   // void* in/out
  FunctionId: Word;   // WORD
  Supported: Pointer   // WORD* optional, out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLGetFunctions';

result := DllCall("ODBC32\SQLGetFunctions"
    , "Ptr", ConnectionHandle   ; void* in/out
    , "UShort", FunctionId   ; WORD
    , "Ptr", Supported   ; WORD* optional, out
    , "Short")   ; return: SHORT

●SQLGetFunctions(ConnectionHandle, FunctionId, Supported) = DLL("ODBC32.dll", "int SQLGetFunctions(void*, int, void*)")
# 呼び出し: SQLGetFunctions(ConnectionHandle, FunctionId, Supported)
# ConnectionHandle : void* in/out -> "void*"
# FunctionId : WORD -> "int"
# Supported : WORD* 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)。