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RealGetWindowClassA

関数

ウィンドウの実際のクラス名を取得する(ANSI版)。

DLLUSER32.dll文字セットANSI (-A)呼出規約winapi

シグネチャ

// USER32.dll  (ANSI / -A)
#include <windows.h>

DWORD RealGetWindowClassA(
    HWND hwnd,
    LPSTR ptszClassName,
    DWORD cchClassNameMax
);

パラメーター

名前	型	方向
hwnd	HWND	in
ptszClassName	LPSTR	out
cchClassNameMax	DWORD	in

戻り値の型: DWORD

各言語での呼び出し定義

// USER32.dll  (ANSI / -A)
#include <windows.h>

DWORD RealGetWindowClassA(
    HWND hwnd,
    LPSTR ptszClassName,
    DWORD cchClassNameMax
);

[DllImport("USER32.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
static extern uint RealGetWindowClassA(
    IntPtr hwnd,   // HWND
    [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder ptszClassName,   // LPSTR out
    uint cchClassNameMax   // DWORD
);

<DllImport("USER32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function RealGetWindowClassA(
    hwnd As IntPtr,   ' HWND
    <MarshalAs(UnmanagedType.LPStr)> ptszClassName As System.Text.StringBuilder,   ' LPSTR out
    cchClassNameMax As UInteger   ' DWORD
) As UInteger
End Function

' hwnd : HWND
' ptszClassName : LPSTR out
' cchClassNameMax : DWORD
Declare PtrSafe Function RealGetWindowClassA Lib "user32" ( _
    ByVal hwnd As LongPtr, _
    ByVal ptszClassName As String, _
    ByVal cchClassNameMax 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

RealGetWindowClassA = ctypes.windll.user32.RealGetWindowClassA
RealGetWindowClassA.restype = wintypes.DWORD
RealGetWindowClassA.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND
    wintypes.LPSTR,  # ptszClassName : LPSTR out
    wintypes.DWORD,  # cchClassNameMax : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
RealGetWindowClassA = Fiddle::Function.new(
  lib['RealGetWindowClassA'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND
    Fiddle::TYPE_VOIDP,  # ptszClassName : LPSTR out
    -Fiddle::TYPE_INT,  # cchClassNameMax : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn RealGetWindowClassA(
        hwnd: *mut core::ffi::c_void,  // HWND
        ptszClassName: *mut u8,  // LPSTR out
        cchClassNameMax: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", CharSet = CharSet.Ansi)]
public static extern uint RealGetWindowClassA(IntPtr hwnd, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder ptszClassName, uint cchClassNameMax);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_RealGetWindowClassA' -Namespace Win32 -PassThru
# $api::RealGetWindowClassA(hwnd, ptszClassName, cchClassNameMax)

#uselib "USER32.dll"
#func global RealGetWindowClassA "RealGetWindowClassA" sptr, sptr, sptr
; RealGetWindowClassA hwnd, varptr(ptszClassName), cchClassNameMax   ; 戻り値は stat
; hwnd : HWND -> "sptr"
; ptszClassName : LPSTR out -> "sptr"
; cchClassNameMax : DWORD -> "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 "USER32.dll"
#cfunc global RealGetWindowClassA "RealGetWindowClassA" sptr, var, int
; res = RealGetWindowClassA(hwnd, ptszClassName, cchClassNameMax)
; hwnd : HWND -> "sptr"
; ptszClassName : LPSTR out -> "var"
; cchClassNameMax : DWORD -> "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。#uselib "USER32.dll"
#cfunc global RealGetWindowClassA "RealGetWindowClassA" sptr, sptr, int
; res = RealGetWindowClassA(hwnd, varptr(ptszClassName), cchClassNameMax)
; hwnd : HWND -> "sptr"
; ptszClassName : LPSTR out -> "sptr"
; cchClassNameMax : DWORD -> "int"
; ※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:

; DWORD RealGetWindowClassA(HWND hwnd, LPSTR ptszClassName, DWORD cchClassNameMax)
#uselib "USER32.dll"
#cfunc global RealGetWindowClassA "RealGetWindowClassA" intptr, var, int
; res = RealGetWindowClassA(hwnd, ptszClassName, cchClassNameMax)
; hwnd : HWND -> "intptr"
; ptszClassName : LPSTR out -> "var"
; cchClassNameMax : DWORD -> "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。; DWORD RealGetWindowClassA(HWND hwnd, LPSTR ptszClassName, DWORD cchClassNameMax)
#uselib "USER32.dll"
#cfunc global RealGetWindowClassA "RealGetWindowClassA" intptr, intptr, int
; res = RealGetWindowClassA(hwnd, varptr(ptszClassName), cchClassNameMax)
; hwnd : HWND -> "intptr"
; ptszClassName : LPSTR out -> "intptr"
; cchClassNameMax : DWORD -> "int"
; ※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 (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procRealGetWindowClassA = user32.NewProc("RealGetWindowClassA")
)

// hwnd (HWND), ptszClassName (LPSTR out), cchClassNameMax (DWORD)
r1, _, err := procRealGetWindowClassA.Call(
	uintptr(hwnd),
	uintptr(ptszClassName),
	uintptr(cchClassNameMax),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function RealGetWindowClassA(
  hwnd: THandle;   // HWND
  ptszClassName: PAnsiChar;   // LPSTR out
  cchClassNameMax: DWORD   // DWORD
): DWORD; stdcall;
  external 'USER32.dll' name 'RealGetWindowClassA';

result := DllCall("USER32\RealGetWindowClassA"
    , "Ptr", hwnd   ; HWND
    , "Ptr", ptszClassName   ; LPSTR out
    , "UInt", cchClassNameMax   ; DWORD
    , "UInt")   ; return: DWORD

●RealGetWindowClassA(hwnd, ptszClassName, cchClassNameMax) = DLL("USER32.dll", "dword RealGetWindowClassA(void*, char*, dword)")
# 呼び出し: RealGetWindowClassA(hwnd, ptszClassName, cchClassNameMax)
# hwnd : HWND -> "void*"
# ptszClassName : LPSTR out -> "char*"
# cchClassNameMax : DWORD -> "dword"
# 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)。