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GetCommConfig

関数

通信デバイスの現在の構成情報を取得する。

DLLKERNEL32.dll呼出規約winapiSetLastErrorあり対応OSWindows XP 以降

シグネチャ

// KERNEL32.dll
#include <windows.h>

BOOL GetCommConfig(
    HANDLE hCommDev,
    COMMCONFIG* lpCC,   // optional
    DWORD* lpdwSize
);

パラメーター

名前	型	方向
hCommDev	HANDLE	in
lpCC	COMMCONFIG*	outoptional
lpdwSize	DWORD*	inout

戻り値の型: BOOL

各言語での呼び出し定義

// KERNEL32.dll
#include <windows.h>

BOOL GetCommConfig(
    HANDLE hCommDev,
    COMMCONFIG* lpCC,   // optional
    DWORD* lpdwSize
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool GetCommConfig(
    IntPtr hCommDev,   // HANDLE
    IntPtr lpCC,   // COMMCONFIG* optional, out
    ref uint lpdwSize   // DWORD* in/out
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetCommConfig(
    hCommDev As IntPtr,   ' HANDLE
    lpCC As IntPtr,   ' COMMCONFIG* optional, out
    ByRef lpdwSize As UInteger   ' DWORD* in/out
) As Boolean
End Function

' hCommDev : HANDLE
' lpCC : COMMCONFIG* optional, out
' lpdwSize : DWORD* in/out
Declare PtrSafe Function GetCommConfig Lib "kernel32" ( _
    ByVal hCommDev As LongPtr, _
    ByVal lpCC As LongPtr, _
    ByRef lpdwSize As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetCommConfig = ctypes.windll.kernel32.GetCommConfig
GetCommConfig.restype = wintypes.BOOL
GetCommConfig.argtypes = [
    wintypes.HANDLE,  # hCommDev : HANDLE
    ctypes.c_void_p,  # lpCC : COMMCONFIG* optional, out
    ctypes.POINTER(wintypes.DWORD),  # lpdwSize : DWORD* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetCommConfig = Fiddle::Function.new(
  lib['GetCommConfig'],
  [
    Fiddle::TYPE_VOIDP,  # hCommDev : HANDLE
    Fiddle::TYPE_VOIDP,  # lpCC : COMMCONFIG* optional, out
    Fiddle::TYPE_VOIDP,  # lpdwSize : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetCommConfig(
        hCommDev: *mut core::ffi::c_void,  // HANDLE
        lpCC: *mut COMMCONFIG,  // COMMCONFIG* optional, out
        lpdwSize: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool GetCommConfig(IntPtr hCommDev, IntPtr lpCC, ref uint lpdwSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetCommConfig' -Namespace Win32 -PassThru
# $api::GetCommConfig(hCommDev, lpCC, lpdwSize)

#uselib "KERNEL32.dll"
#func global GetCommConfig "GetCommConfig" sptr, sptr, sptr
; GetCommConfig hCommDev, varptr(lpCC), varptr(lpdwSize)   ; 戻り値は stat
; hCommDev : HANDLE -> "sptr"
; lpCC : COMMCONFIG* optional, out -> "sptr"
; lpdwSize : DWORD* in/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。

出力引数:

#uselib "KERNEL32.dll"
#cfunc global GetCommConfig "GetCommConfig" sptr, var, var
; res = GetCommConfig(hCommDev, lpCC, lpdwSize)
; hCommDev : HANDLE -> "sptr"
; lpCC : COMMCONFIG* optional, out -> "var"
; lpdwSize : DWORD* in/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。#uselib "KERNEL32.dll"
#cfunc global GetCommConfig "GetCommConfig" sptr, sptr, sptr
; res = GetCommConfig(hCommDev, varptr(lpCC), varptr(lpdwSize))
; hCommDev : HANDLE -> "sptr"
; lpCC : COMMCONFIG* optional, out -> "sptr"
; lpdwSize : DWORD* in/out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; BOOL GetCommConfig(HANDLE hCommDev, COMMCONFIG* lpCC, DWORD* lpdwSize)
#uselib "KERNEL32.dll"
#cfunc global GetCommConfig "GetCommConfig" intptr, var, var
; res = GetCommConfig(hCommDev, lpCC, lpdwSize)
; hCommDev : HANDLE -> "intptr"
; lpCC : COMMCONFIG* optional, out -> "var"
; lpdwSize : DWORD* in/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。; BOOL GetCommConfig(HANDLE hCommDev, COMMCONFIG* lpCC, DWORD* lpdwSize)
#uselib "KERNEL32.dll"
#cfunc global GetCommConfig "GetCommConfig" intptr, intptr, intptr
; res = GetCommConfig(hCommDev, varptr(lpCC), varptr(lpdwSize))
; hCommDev : HANDLE -> "intptr"
; lpCC : COMMCONFIG* optional, out -> "intptr"
; lpdwSize : DWORD* in/out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procGetCommConfig = kernel32.NewProc("GetCommConfig")
)

// hCommDev (HANDLE), lpCC (COMMCONFIG* optional, out), lpdwSize (DWORD* in/out)
r1, _, err := procGetCommConfig.Call(
	uintptr(hCommDev),
	uintptr(lpCC),
	uintptr(lpdwSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetCommConfig(
  hCommDev: THandle;   // HANDLE
  lpCC: Pointer;   // COMMCONFIG* optional, out
  lpdwSize: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'GetCommConfig';

result := DllCall("KERNEL32\GetCommConfig"
    , "Ptr", hCommDev   ; HANDLE
    , "Ptr", lpCC   ; COMMCONFIG* optional, out
    , "Ptr", lpdwSize   ; DWORD* in/out
    , "Int")   ; return: BOOL

●GetCommConfig(hCommDev, lpCC, lpdwSize) = DLL("KERNEL32.dll", "bool GetCommConfig(void*, void*, void*)")
# 呼び出し: GetCommConfig(hCommDev, lpCC, lpdwSize)
# hCommDev : HANDLE -> "void*"
# lpCC : COMMCONFIG* optional, out -> "void*"
# lpdwSize : DWORD* in/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)。