private void txtuser_Leave(object sender, EventArgs e)
{
//检查是否需要验证码
int state = qq.CheckVerify(txtuser.Text.Trim());
if (state == 3)
{
this.Text = "检测到需要验证码。";
pic_verify.Image = qq.getCapture();
}
else if (state == 2)
{
MessageBox.Show("获取验证码出现错误！请重新打开本程序！");
}
else if (state == 1)
{
this.Text = "检测到不需要验证码。";
}
}