public Form1()
{
InitializeComponent();
BookCallBack call = new BookCallBack();
call.mainThread += new BookCallBack.delegateDisplayResult(DisplayResult);
instanceContext = new InstanceContext(call);
}
private void DisplayResult(string name)
{
if (this.txt_BookMsg.InvokeRequired)
{
call = new BookCallBack();
call.mainThread += new BookCallBack.delegateDisplayResult(DisplayResult);
this.Invoke(call.mainThread, name);
}
else
{
txt_BookMsg.Text = name;
}
}