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WaitMessage

関数

メッセージがキューに届くまでスレッドを待機させる。

DLLUSER32.dll呼出規約winapiSetLastErrorあり対応OSWindows 2000 以降

シグネチャ

// USER32.dll
#include <windows.h>

BOOL WaitMessage(void);

パラメーターなし。戻り値: BOOL

各言語での呼び出し定義

// USER32.dll
#include <windows.h>

BOOL WaitMessage(void);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool WaitMessage();

<DllImport("USER32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WaitMessage() As Boolean
End Function

Declare PtrSafe Function WaitMessage Lib "user32" () As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

WaitMessage = ctypes.windll.user32.WaitMessage
WaitMessage.restype = wintypes.BOOL
WaitMessage.argtypes = []
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
WaitMessage = Fiddle::Function.new(
  lib['WaitMessage'],
  [],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn WaitMessage() -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", SetLastError = true)]
public static extern bool WaitMessage();
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_WaitMessage' -Namespace Win32 -PassThru
# $api::WaitMessage()

#uselib "USER32.dll"
#func global WaitMessage "WaitMessage"
; WaitMessage   ; 戻り値は stat
; ※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 "USER32.dll"
#cfunc global WaitMessage "WaitMessage"
; res = WaitMessage()

; BOOL WaitMessage()
#uselib "USER32.dll"
#cfunc global WaitMessage "WaitMessage"
; res = WaitMessage()

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procWaitMessage = user32.NewProc("WaitMessage")
)

r1, _, err := procWaitMessage.Call()
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function WaitMessage: BOOL; stdcall;
  external 'USER32.dll' name 'WaitMessage';

result := DllCall("USER32\WaitMessage", "Int")

●WaitMessage() = DLL("USER32.dll", "bool WaitMessage()")
# 呼び出し: WaitMessage()
# 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)。