SQLSetEnvAttr

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

SHORT SQLSetEnvAttr(
    void* EnvironmentHandle,
    INT Attribute,
    void* Value,   // optional
    INT StringLength
);

<DllImport("ODBC32.dll", ExactSpelling:=True)>
Public Shared Function SQLSetEnvAttr(
    EnvironmentHandle As IntPtr,   ' void* in/out
    Attribute As Integer,   ' INT
    Value As IntPtr,   ' void* optional
    StringLength As Integer   ' INT
) As Short
End Function

' EnvironmentHandle : void* in/out
' Attribute : INT
' Value : void* optional
' StringLength : INT
Declare PtrSafe Function SQLSetEnvAttr Lib "odbc32" ( _
    ByVal EnvironmentHandle As LongPtr, _
    ByVal Attribute As Long, _
    ByVal Value As LongPtr, _
    ByVal StringLength As Long) As Integer
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SQLSetEnvAttr = ctypes.windll.odbc32.SQLSetEnvAttr
SQLSetEnvAttr.restype = ctypes.c_short
SQLSetEnvAttr.argtypes = [
    ctypes.POINTER(None),  # EnvironmentHandle : void* in/out
    ctypes.c_int,  # Attribute : INT
    ctypes.POINTER(None),  # Value : void* optional
    ctypes.c_int,  # StringLength : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLSetEnvAttr = Fiddle::Function.new(
  lib['SQLSetEnvAttr'],
  [
    Fiddle::TYPE_VOIDP,  # EnvironmentHandle : void* in/out
    Fiddle::TYPE_INT,  # Attribute : INT
    Fiddle::TYPE_VOIDP,  # Value : void* optional
    Fiddle::TYPE_INT,  # StringLength : INT
  ],
  Fiddle::TYPE_SHORT)

#[link(name = "odbc32")]
extern "system" {
    fn SQLSetEnvAttr(
        EnvironmentHandle: *mut (),  // void* in/out
        Attribute: i32,  // INT
        Value: *mut (),  // void* optional
        StringLength: i32  // INT
    ) -> i16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ODBC32.dll")]
public static extern short SQLSetEnvAttr(IntPtr EnvironmentHandle, int Attribute, IntPtr Value, int StringLength);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLSetEnvAttr' -Namespace Win32 -PassThru
# $api::SQLSetEnvAttr(EnvironmentHandle, Attribute, Value, StringLength)

#uselib "ODBC32.dll"
#func global SQLSetEnvAttr "SQLSetEnvAttr" sptr, sptr, sptr, sptr
; SQLSetEnvAttr EnvironmentHandle, Attribute, Value, StringLength   ; 戻り値は stat
; EnvironmentHandle : void* in/out -> "sptr"
; Attribute : INT -> "sptr"
; Value : void* optional -> "sptr"
; StringLength : INT -> "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 SQLSetEnvAttr "SQLSetEnvAttr" sptr, int, sptr, int
; res = SQLSetEnvAttr(EnvironmentHandle, Attribute, Value, StringLength)
; EnvironmentHandle : void* in/out -> "sptr"
; Attribute : INT -> "int"
; Value : void* optional -> "sptr"
; StringLength : INT -> "int"

; SHORT SQLSetEnvAttr(void* EnvironmentHandle, INT Attribute, void* Value, INT StringLength)
#uselib "ODBC32.dll"
#cfunc global SQLSetEnvAttr "SQLSetEnvAttr" intptr, int, intptr, int
; res = SQLSetEnvAttr(EnvironmentHandle, Attribute, Value, StringLength)
; EnvironmentHandle : void* in/out -> "intptr"
; Attribute : INT -> "int"
; Value : void* optional -> "intptr"
; StringLength : INT -> "int"

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

var (
	odbc32 = windows.NewLazySystemDLL("ODBC32.dll")
	procSQLSetEnvAttr = odbc32.NewProc("SQLSetEnvAttr")
)

// EnvironmentHandle (void* in/out), Attribute (INT), Value (void* optional), StringLength (INT)
r1, _, err := procSQLSetEnvAttr.Call(
	uintptr(EnvironmentHandle),
	uintptr(Attribute),
	uintptr(Value),
	uintptr(StringLength),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SHORT

function SQLSetEnvAttr(
  EnvironmentHandle: Pointer;   // void* in/out
  Attribute: Integer;   // INT
  Value: Pointer;   // void* optional
  StringLength: Integer   // INT
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLSetEnvAttr';

result := DllCall("ODBC32\SQLSetEnvAttr"
    , "Ptr", EnvironmentHandle   ; void* in/out
    , "Int", Attribute   ; INT
    , "Ptr", Value   ; void* optional
    , "Int", StringLength   ; INT
    , "Short")   ; return: SHORT

●SQLSetEnvAttr(EnvironmentHandle, Attribute, Value, StringLength) = DLL("ODBC32.dll", "int SQLSetEnvAttr(void*, int, void*, int)")
# 呼び出し: SQLSetEnvAttr(EnvironmentHandle, Attribute, Value, StringLength)
# EnvironmentHandle : void* in/out -> "void*"
# Attribute : INT -> "int"
# Value : void* optional -> "void*"
# StringLength : INT -> "int"
# 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)。