2019-07-23

備忘録

using System;
using System.Runtime.InteropServices;
using System.Text;

public static class Program
{
private delegate bool EnumWindowsDelegate( IntPtr hWnd, IntPtr lparam );

[DllImport( "user32.dll" )]
static extern Int32 FlashWindowEx( ref FLASHWINFO pwfi );

[DllImport( "user32.dll" )]
[return: MarshalAs( UnmanagedType.Bool )]
private extern static bool EnumWindows( EnumWindowsDelegate lpEnumFunc, IntPtr lparam );

[DllImport( "user32.dll", CharSet = CharSet.Auto, SetLastError = true )]
private static extern int GetClassName( IntPtr hWnd, StringBuilder lpClassName, int nMaxCount );

[StructLayout( LayoutKind.Sequential )]
public struct FLASHWINFO
{
public UInt32 cbSize ; // FLASHWINFO構造体のサイズ
public IntPtr hwnd ; // 点滅対象のウィンドウ・ハンドル
public UInt32 dwFlags ; // 以下の「FLASHW_XXX」のいずれか
public UInt32 uCount ; // 点滅する回数
public UInt32 dwTimeout; // 点滅する間隔（ミリ秒単位）
}

//public const UInt32 FLASHW_STOP = 0 ; // 点滅を止める
//public const UInt32 FLASHW_CAPTION = 1 ; // タイトルバーを点滅させる
//public const UInt32 FLASHW_TRAY = 2 ; // タスクバー・ボタンを点滅させる
//public const UInt32 FLASHW_ALL = 3 ; // タスクバー・ボタンとタイトルバーを点滅させる
//public const UInt32 FLASHW_TIMER = 4 ; // FLASHW_STOPが指定されるまでずっと点滅させる
public const UInt32 FLASHW_TIMERNOFG = 12; // ウィンドウが最前面に来るまでずっと点滅させる

private static string m_searchClassName;
private static IntPtr m_hWnd;

private static void Main()
{
m_searchClassName = "Unity";
EnumWindows( new EnumWindowsDelegate( EnumWindowCallBack ), IntPtr.Zero );

var fInfo = new FLASHWINFO();
fInfo.cbSize = Convert.ToUInt32( Marshal.SizeOf( fInfo ) );
fInfo.hwnd = m_hWnd;
fInfo.dwFlags = FLASHW_TIMERNOFG;
fInfo.uCount = 12;
fInfo.dwTimeout = 12;

FlashWindowEx( ref fInfo );
}

private static bool EnumWindowCallBack( IntPtr hWnd, IntPtr lparam )
{
var csb = new StringBuilder( 256 );
GetClassName( hWnd, csb, csb.Capacity );
if ( !csb.ToString().Contains( m_searchClassName ) ) return true;
m_hWnd = hWnd;
return true;
}
}

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csc.exe /target:library flash.cs

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