OnOpenSucceeded注册：
this.axPlayer1.OnOpenSucceeded += new EventHandler(axPlayer_OnOpenSucceeded);
打开视频前：
this.axPlayer1.SetConfig(602, "1");
this.axPlayer1.Open(videoPath);
OnOpenSucceeded实现：
private void axPlayer_OnOpenSucceeded(object sender, EventArgs e)
{
this.axPlayer1.SetConfig(617, "E:\\test.png");
}
能播放视频，但是叠加的图片没有显示出来，有大佬知道怎么解决不？
