Win32 API 日本語リファレンス
ホームUI.WindowsAndMessaging › CallMsgFilterA

CallMsgFilterA

関数
メッセージフィルタフックを呼び出す(ANSI)。
DLLUSER32.dll文字セットANSI (-A)呼出規約winapi対応OSWindows 2000 以降

シグネチャ

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

BOOL CallMsgFilterA(
    MSG* lpMsg,
    INT nCode
);

パラメーター

名前方向
lpMsgMSG*in
nCodeINTin

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL CallMsgFilterA(
    MSG* lpMsg,
    INT nCode
);
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
static extern bool CallMsgFilterA(
    IntPtr lpMsg,   // MSG*
    int nCode   // INT
);
<DllImport("USER32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function CallMsgFilterA(
    lpMsg As IntPtr,   ' MSG*
    nCode As Integer   ' INT
) As Boolean
End Function
' lpMsg : MSG*
' nCode : INT
Declare PtrSafe Function CallMsgFilterA Lib "user32" ( _
    ByVal lpMsg As LongPtr, _
    ByVal nCode 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

CallMsgFilterA = ctypes.windll.user32.CallMsgFilterA
CallMsgFilterA.restype = wintypes.BOOL
CallMsgFilterA.argtypes = [
    ctypes.c_void_p,  # lpMsg : MSG*
    ctypes.c_int,  # nCode : INT
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
CallMsgFilterA = Fiddle::Function.new(
  lib['CallMsgFilterA'],
  [
    Fiddle::TYPE_VOIDP,  # lpMsg : MSG*
    Fiddle::TYPE_INT,  # nCode : INT
  ],
  Fiddle::TYPE_INT)
#[link(name = "user32")]
extern "system" {
    fn CallMsgFilterA(
        lpMsg: *mut MSG,  // MSG*
        nCode: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", CharSet = CharSet.Ansi)]
public static extern bool CallMsgFilterA(IntPtr lpMsg, int nCode);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_CallMsgFilterA' -Namespace Win32 -PassThru
# $api::CallMsgFilterA(lpMsg, nCode)
#uselib "USER32.dll"
#func global CallMsgFilterA "CallMsgFilterA" sptr, sptr
; CallMsgFilterA varptr(lpMsg), nCode   ; 戻り値は stat
; lpMsg : MSG* -> "sptr"
; nCode : 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。
出力引数:
#uselib "USER32.dll"
#cfunc global CallMsgFilterA "CallMsgFilterA" var, int
; res = CallMsgFilterA(lpMsg, nCode)
; lpMsg : MSG* -> "var"
; nCode : INT -> "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。
出力引数:
; BOOL CallMsgFilterA(MSG* lpMsg, INT nCode)
#uselib "USER32.dll"
#cfunc global CallMsgFilterA "CallMsgFilterA" var, int
; res = CallMsgFilterA(lpMsg, nCode)
; lpMsg : MSG* -> "var"
; nCode : INT -> "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 (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procCallMsgFilterA = user32.NewProc("CallMsgFilterA")
)

// lpMsg (MSG*), nCode (INT)
r1, _, err := procCallMsgFilterA.Call(
	uintptr(lpMsg),
	uintptr(nCode),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL
function CallMsgFilterA(
  lpMsg: Pointer;   // MSG*
  nCode: Integer   // INT
): BOOL; stdcall;
  external 'USER32.dll' name 'CallMsgFilterA';
result := DllCall("USER32\CallMsgFilterA"
    , "Ptr", lpMsg   ; MSG*
    , "Int", nCode   ; INT
    , "Int")   ; return: BOOL
●CallMsgFilterA(lpMsg, nCode) = DLL("USER32.dll", "bool CallMsgFilterA(void*, int)")
# 呼び出し: CallMsgFilterA(lpMsg, nCode)
# lpMsg : MSG* -> "void*"
# nCode : 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)。