c#用DirectShow开发播放器如何实现全屏?

[jy12100]

private void menuFull_Click(object sender, System.EventArgs e)
{
if (objVideoWindow != null)
{
if (objVideoWindow.FullScreenMode == 0)
objVideoWindow.FullScreenMode = 1;
else
objVideoWindow.FullScreenMode = 0;
}
}

protected override void OnKeyDown(System.Windows.Forms.KeyEventArgs e)
{
if (e.KeyCode == Keys.Delete)
{
menuDelSelect_Click(menuDelSelect,null);
}

if ( (e.Alt) && (e.KeyCode == System.Windows.Forms.Keys.Return))
{
menuFull_Click(menuFull, null);
}
base.OnKeyDown(e);
}
为什么不能实现？

[jy12100]

没人知道吗

[jy12100]

帮下忙啊。。。

[指间的风]

http://www.host01.com/article/Net/00020007/20060917184023243.htm