private bool ExecNext(string msg, int count)
{
//--実行権の取得
this.WriteLine("Borrow");
TestFunction dlg = new TestFunction(this.testFunction);
TestThread dlg2 = new TestThread(this.Exec_thread);
dlg2.BeginInvoke(
dlg, msg, count,
new System.AsyncCallback(this.Exec_callback),
new object[] { dlg2, msg } //←Exec_callback() の ar.AsyncState に入る
);
return(true);
}