SQLNumResultCols

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

SHORT SQLNumResultCols(
    void* StatementHandle,
    SHORT* ColumnCount
);

<DllImport("ODBC32.dll", ExactSpelling:=True)>
Public Shared Function SQLNumResultCols(
    StatementHandle As IntPtr,   ' void* in/out
    <Out> ByRef ColumnCount As Short   ' SHORT* out
) As Short
End Function

' StatementHandle : void* in/out
' ColumnCount : SHORT* out
Declare PtrSafe Function SQLNumResultCols Lib "odbc32" ( _
    ByVal StatementHandle As LongPtr, _
    ByRef ColumnCount As Integer) As Integer
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SQLNumResultCols = ctypes.windll.odbc32.SQLNumResultCols
SQLNumResultCols.restype = ctypes.c_short
SQLNumResultCols.argtypes = [
    ctypes.POINTER(None),  # StatementHandle : void* in/out
    ctypes.POINTER(ctypes.c_short),  # ColumnCount : SHORT* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLNumResultCols = Fiddle::Function.new(
  lib['SQLNumResultCols'],
  [
    Fiddle::TYPE_VOIDP,  # StatementHandle : void* in/out
    Fiddle::TYPE_VOIDP,  # ColumnCount : SHORT* out
  ],
  Fiddle::TYPE_SHORT)

#[link(name = "odbc32")]
extern "system" {
    fn SQLNumResultCols(
        StatementHandle: *mut (),  // void* in/out
        ColumnCount: *mut i16  // SHORT* out
    ) -> i16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ODBC32.dll")]
public static extern short SQLNumResultCols(IntPtr StatementHandle, out short ColumnCount);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLNumResultCols' -Namespace Win32 -PassThru
# $api::SQLNumResultCols(StatementHandle, ColumnCount)

#uselib "ODBC32.dll"
#func global SQLNumResultCols "SQLNumResultCols" sptr, sptr
; SQLNumResultCols StatementHandle, varptr(ColumnCount)   ; 戻り値は stat
; StatementHandle : void* in/out -> "sptr"
; ColumnCount : SHORT* 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 SQLNumResultCols "SQLNumResultCols" sptr, var
; res = SQLNumResultCols(StatementHandle, ColumnCount)
; StatementHandle : void* in/out -> "sptr"
; ColumnCount : SHORT* 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 SQLNumResultCols(void* StatementHandle, SHORT* ColumnCount)
#uselib "ODBC32.dll"
#cfunc global SQLNumResultCols "SQLNumResultCols" intptr, var
; res = SQLNumResultCols(StatementHandle, ColumnCount)
; StatementHandle : void* in/out -> "intptr"
; ColumnCount : SHORT* 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")
	procSQLNumResultCols = odbc32.NewProc("SQLNumResultCols")
)

// StatementHandle (void* in/out), ColumnCount (SHORT* out)
r1, _, err := procSQLNumResultCols.Call(
	uintptr(StatementHandle),
	uintptr(ColumnCount),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SHORT

function SQLNumResultCols(
  StatementHandle: Pointer;   // void* in/out
  ColumnCount: Pointer   // SHORT* out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLNumResultCols';

result := DllCall("ODBC32\SQLNumResultCols"
    , "Ptr", StatementHandle   ; void* in/out
    , "Ptr", ColumnCount   ; SHORT* out
    , "Short")   ; return: SHORT

●SQLNumResultCols(StatementHandle, ColumnCount) = DLL("ODBC32.dll", "int SQLNumResultCols(void*, void*)")
# 呼び出し: SQLNumResultCols(StatementHandle, ColumnCount)
# StatementHandle : void* in/out -> "void*"
# ColumnCount : SHORT* 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)。