SQLSetDescField

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

SHORT SQLSetDescField(
    void* DescriptorHandle,
    SHORT RecNumber,
    SHORT FieldIdentifier,
    void* Value,
    INT BufferLength
);

<DllImport("ODBC32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SQLSetDescField(
    DescriptorHandle As IntPtr,   ' void* in/out
    RecNumber As Short,   ' SHORT
    FieldIdentifier As Short,   ' SHORT
    Value As IntPtr,   ' void*
    BufferLength As Integer   ' INT
) As Short
End Function

' DescriptorHandle : void* in/out
' RecNumber : SHORT
' FieldIdentifier : SHORT
' Value : void*
' BufferLength : INT
Declare PtrSafe Function SQLSetDescField Lib "odbc32" ( _
    ByVal DescriptorHandle As LongPtr, _
    ByVal RecNumber As Integer, _
    ByVal FieldIdentifier As Integer, _
    ByVal Value As LongPtr, _
    ByVal BufferLength 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

SQLSetDescField = ctypes.windll.odbc32.SQLSetDescField
SQLSetDescField.restype = ctypes.c_short
SQLSetDescField.argtypes = [
    ctypes.POINTER(None),  # DescriptorHandle : void* in/out
    ctypes.c_short,  # RecNumber : SHORT
    ctypes.c_short,  # FieldIdentifier : SHORT
    ctypes.POINTER(None),  # Value : void*
    ctypes.c_int,  # BufferLength : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLSetDescField = Fiddle::Function.new(
  lib['SQLSetDescField'],
  [
    Fiddle::TYPE_VOIDP,  # DescriptorHandle : void* in/out
    Fiddle::TYPE_SHORT,  # RecNumber : SHORT
    Fiddle::TYPE_SHORT,  # FieldIdentifier : SHORT
    Fiddle::TYPE_VOIDP,  # Value : void*
    Fiddle::TYPE_INT,  # BufferLength : INT
  ],
  Fiddle::TYPE_SHORT)

#[link(name = "odbc32")]
extern "system" {
    fn SQLSetDescField(
        DescriptorHandle: *mut (),  // void* in/out
        RecNumber: i16,  // SHORT
        FieldIdentifier: i16,  // SHORT
        Value: *mut (),  // void*
        BufferLength: i32  // INT
    ) -> i16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ODBC32.dll", CharSet = CharSet.Ansi)]
public static extern short SQLSetDescField(IntPtr DescriptorHandle, short RecNumber, short FieldIdentifier, IntPtr Value, int BufferLength);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLSetDescField' -Namespace Win32 -PassThru
# $api::SQLSetDescField(DescriptorHandle, RecNumber, FieldIdentifier, Value, BufferLength)

#uselib "ODBC32.dll"
#func global SQLSetDescField "SQLSetDescField" sptr, sptr, sptr, sptr, sptr
; SQLSetDescField DescriptorHandle, RecNumber, FieldIdentifier, Value, BufferLength   ; 戻り値は stat
; DescriptorHandle : void* in/out -> "sptr"
; RecNumber : SHORT -> "sptr"
; FieldIdentifier : SHORT -> "sptr"
; Value : void* -> "sptr"
; BufferLength : 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 SQLSetDescField "SQLSetDescField" sptr, int, int, sptr, int
; res = SQLSetDescField(DescriptorHandle, RecNumber, FieldIdentifier, Value, BufferLength)
; DescriptorHandle : void* in/out -> "sptr"
; RecNumber : SHORT -> "int"
; FieldIdentifier : SHORT -> "int"
; Value : void* -> "sptr"
; BufferLength : INT -> "int"

; SHORT SQLSetDescField(void* DescriptorHandle, SHORT RecNumber, SHORT FieldIdentifier, void* Value, INT BufferLength)
#uselib "ODBC32.dll"
#cfunc global SQLSetDescField "SQLSetDescField" intptr, int, int, intptr, int
; res = SQLSetDescField(DescriptorHandle, RecNumber, FieldIdentifier, Value, BufferLength)
; DescriptorHandle : void* in/out -> "intptr"
; RecNumber : SHORT -> "int"
; FieldIdentifier : SHORT -> "int"
; Value : void* -> "intptr"
; BufferLength : INT -> "int"

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

var (
	odbc32 = windows.NewLazySystemDLL("ODBC32.dll")
	procSQLSetDescField = odbc32.NewProc("SQLSetDescField")
)

// DescriptorHandle (void* in/out), RecNumber (SHORT), FieldIdentifier (SHORT), Value (void*), BufferLength (INT)
r1, _, err := procSQLSetDescField.Call(
	uintptr(DescriptorHandle),
	uintptr(RecNumber),
	uintptr(FieldIdentifier),
	uintptr(Value),
	uintptr(BufferLength),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SHORT

function SQLSetDescField(
  DescriptorHandle: Pointer;   // void* in/out
  RecNumber: Smallint;   // SHORT
  FieldIdentifier: Smallint;   // SHORT
  Value: Pointer;   // void*
  BufferLength: Integer   // INT
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLSetDescField';

result := DllCall("ODBC32\SQLSetDescField"
    , "Ptr", DescriptorHandle   ; void* in/out
    , "Short", RecNumber   ; SHORT
    , "Short", FieldIdentifier   ; SHORT
    , "Ptr", Value   ; void*
    , "Int", BufferLength   ; INT
    , "Short")   ; return: SHORT

●SQLSetDescField(DescriptorHandle, RecNumber, FieldIdentifier, Value, BufferLength) = DLL("ODBC32.dll", "int SQLSetDescField(void*, int, int, void*, int)")
# 呼び出し: SQLSetDescField(DescriptorHandle, RecNumber, FieldIdentifier, Value, BufferLength)
# DescriptorHandle : void* in/out -> "void*"
# RecNumber : SHORT -> "int"
# FieldIdentifier : SHORT -> "int"
# Value : void* -> "void*"
# BufferLength : 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)。