SQLConnect

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

SHORT SQLConnect(
    void* ConnectionHandle,
    BYTE* ServerName,
    SHORT NameLength1,
    BYTE* UserName,
    SHORT NameLength2,
    BYTE* Authentication,
    SHORT NameLength3
);

<DllImport("ODBC32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SQLConnect(
    ConnectionHandle As IntPtr,   ' void* in/out
    ServerName As IntPtr,   ' BYTE*
    NameLength1 As Short,   ' SHORT
    UserName As IntPtr,   ' BYTE*
    NameLength2 As Short,   ' SHORT
    Authentication As IntPtr,   ' BYTE*
    NameLength3 As Short   ' SHORT
) As Short
End Function

' ConnectionHandle : void* in/out
' ServerName : BYTE*
' NameLength1 : SHORT
' UserName : BYTE*
' NameLength2 : SHORT
' Authentication : BYTE*
' NameLength3 : SHORT
Declare PtrSafe Function SQLConnect Lib "odbc32" ( _
    ByVal ConnectionHandle As LongPtr, _
    ByVal ServerName As LongPtr, _
    ByVal NameLength1 As Integer, _
    ByVal UserName As LongPtr, _
    ByVal NameLength2 As Integer, _
    ByVal Authentication As LongPtr, _
    ByVal NameLength3 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

SQLConnect = ctypes.windll.odbc32.SQLConnect
SQLConnect.restype = ctypes.c_short
SQLConnect.argtypes = [
    ctypes.POINTER(None),  # ConnectionHandle : void* in/out
    ctypes.POINTER(ctypes.c_ubyte),  # ServerName : BYTE*
    ctypes.c_short,  # NameLength1 : SHORT
    ctypes.POINTER(ctypes.c_ubyte),  # UserName : BYTE*
    ctypes.c_short,  # NameLength2 : SHORT
    ctypes.POINTER(ctypes.c_ubyte),  # Authentication : BYTE*
    ctypes.c_short,  # NameLength3 : SHORT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLConnect = Fiddle::Function.new(
  lib['SQLConnect'],
  [
    Fiddle::TYPE_VOIDP,  # ConnectionHandle : void* in/out
    Fiddle::TYPE_VOIDP,  # ServerName : BYTE*
    Fiddle::TYPE_SHORT,  # NameLength1 : SHORT
    Fiddle::TYPE_VOIDP,  # UserName : BYTE*
    Fiddle::TYPE_SHORT,  # NameLength2 : SHORT
    Fiddle::TYPE_VOIDP,  # Authentication : BYTE*
    Fiddle::TYPE_SHORT,  # NameLength3 : SHORT
  ],
  Fiddle::TYPE_SHORT)

#[link(name = "odbc32")]
extern "system" {
    fn SQLConnect(
        ConnectionHandle: *mut (),  // void* in/out
        ServerName: *mut u8,  // BYTE*
        NameLength1: i16,  // SHORT
        UserName: *mut u8,  // BYTE*
        NameLength2: i16,  // SHORT
        Authentication: *mut u8,  // BYTE*
        NameLength3: i16  // SHORT
    ) -> i16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ODBC32.dll", CharSet = CharSet.Ansi)]
public static extern short SQLConnect(IntPtr ConnectionHandle, IntPtr ServerName, short NameLength1, IntPtr UserName, short NameLength2, IntPtr Authentication, short NameLength3);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLConnect' -Namespace Win32 -PassThru
# $api::SQLConnect(ConnectionHandle, ServerName, NameLength1, UserName, NameLength2, Authentication, NameLength3)

#uselib "ODBC32.dll"
#func global SQLConnect "SQLConnect" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; SQLConnect ConnectionHandle, varptr(ServerName), NameLength1, varptr(UserName), NameLength2, varptr(Authentication), NameLength3   ; 戻り値は stat
; ConnectionHandle : void* in/out -> "sptr"
; ServerName : BYTE* -> "sptr"
; NameLength1 : SHORT -> "sptr"
; UserName : BYTE* -> "sptr"
; NameLength2 : SHORT -> "sptr"
; Authentication : BYTE* -> "sptr"
; NameLength3 : SHORT -> "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 SQLConnect "SQLConnect" sptr, var, int, var, int, var, int
; res = SQLConnect(ConnectionHandle, ServerName, NameLength1, UserName, NameLength2, Authentication, NameLength3)
; ConnectionHandle : void* in/out -> "sptr"
; ServerName : BYTE* -> "var"
; NameLength1 : SHORT -> "int"
; UserName : BYTE* -> "var"
; NameLength2 : SHORT -> "int"
; Authentication : BYTE* -> "var"
; NameLength3 : SHORT -> "int"
; ※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 SQLConnect(void* ConnectionHandle, BYTE* ServerName, SHORT NameLength1, BYTE* UserName, SHORT NameLength2, BYTE* Authentication, SHORT NameLength3)
#uselib "ODBC32.dll"
#cfunc global SQLConnect "SQLConnect" intptr, var, int, var, int, var, int
; res = SQLConnect(ConnectionHandle, ServerName, NameLength1, UserName, NameLength2, Authentication, NameLength3)
; ConnectionHandle : void* in/out -> "intptr"
; ServerName : BYTE* -> "var"
; NameLength1 : SHORT -> "int"
; UserName : BYTE* -> "var"
; NameLength2 : SHORT -> "int"
; Authentication : BYTE* -> "var"
; NameLength3 : SHORT -> "int"
; ※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")
	procSQLConnect = odbc32.NewProc("SQLConnect")
)

// ConnectionHandle (void* in/out), ServerName (BYTE*), NameLength1 (SHORT), UserName (BYTE*), NameLength2 (SHORT), Authentication (BYTE*), NameLength3 (SHORT)
r1, _, err := procSQLConnect.Call(
	uintptr(ConnectionHandle),
	uintptr(ServerName),
	uintptr(NameLength1),
	uintptr(UserName),
	uintptr(NameLength2),
	uintptr(Authentication),
	uintptr(NameLength3),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SHORT

function SQLConnect(
  ConnectionHandle: Pointer;   // void* in/out
  ServerName: Pointer;   // BYTE*
  NameLength1: Smallint;   // SHORT
  UserName: Pointer;   // BYTE*
  NameLength2: Smallint;   // SHORT
  Authentication: Pointer;   // BYTE*
  NameLength3: Smallint   // SHORT
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLConnect';

result := DllCall("ODBC32\SQLConnect"
    , "Ptr", ConnectionHandle   ; void* in/out
    , "Ptr", ServerName   ; BYTE*
    , "Short", NameLength1   ; SHORT
    , "Ptr", UserName   ; BYTE*
    , "Short", NameLength2   ; SHORT
    , "Ptr", Authentication   ; BYTE*
    , "Short", NameLength3   ; SHORT
    , "Short")   ; return: SHORT

●SQLConnect(ConnectionHandle, ServerName, NameLength1, UserName, NameLength2, Authentication, NameLength3) = DLL("ODBC32.dll", "int SQLConnect(void*, void*, int, void*, int, void*, int)")
# 呼び出し: SQLConnect(ConnectionHandle, ServerName, NameLength1, UserName, NameLength2, Authentication, NameLength3)
# ConnectionHandle : void* in/out -> "void*"
# ServerName : BYTE* -> "void*"
# NameLength1 : SHORT -> "int"
# UserName : BYTE* -> "void*"
# NameLength2 : SHORT -> "int"
# Authentication : BYTE* -> "void*"
# NameLength3 : SHORT -> "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)。