using Pwt = Microsoft.Office.Interop.PowerPoint;

private Pwt.Application app;
private Pwt.Presentation pres;

3. 调用

try {
	app = new Pwt.Application();
	app.SlideShowBegin += new Pwt.EApplication_SlideShowBeginEventHandler(app_SlideShowBegin);
	app.SlideShowEnd += new Pwt.EApplication_SlideShowEndEventHandler(app_SlideShowEnd);
	app.Visible = MsoTriState.msoTrue;
	app.WindowState = Pwt.PpWindowState.ppWindowMinimized;
	pres = app.Presentations.Open(System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Agenda.ppt"), MsoTriState.msoFalse, MsoTriState.msoTrue, MsoTriState.msoTrue);
	app.ActivePresentation.SlideShowSettings.Run();
	pres.SlideShowWindow.Left = 200;
	pres.SlideShowWindow.Top = 200;
	pres.SlideShowWindow.Width = 600;
	pres.SlideShowWindow.Height = 450;
} catch (Exception ex) {
	Trace.WriteLine(ex.ToString());
	Quit();
}

4. 清理

void app_SlideShowEnd(Pwt.Presentation Pres) {
	this.Dispatcher.BeginInvoke((Action)(() => {
		Quit();
	}));
}

private void Quit() {
	try {
		pres.Close();
		app.Quit();
		GC.Collect();
	} catch (Exception ex) {
		Trace.WriteLine(ex.ToString());
	} finally {
		try { Process.GetProcessesByName("POWERPNT")[0].Kill(); } catch { }
	}
}

5. 下载source
PlayPwt.7z

Reference from:  http://www.acure-fun.net/about/index.html
结合在Unilever看到的VR，目前可以感觉到Digital Retail的趋势。
如果数字化还只是专注于辅助性质的营销，像传统的Digital Signage显示广告的模式还是会因为成本等等等因素而被cut掉；要想坚挺，那么必须也不得不将数字化推向营销第一线，类似acure这样的vending machine真的拥有很大的想象空间。

有点绕，其实就一句话，
当你给别人PowerPoint的时候，除了采用Publish CD的方式，同样可以将Video copy到ppt(x)同一目录下解决Video Link的问题。

• 幻灯片1
• 幻灯片2
• 幻灯片3
• 幻灯片4
• 幻灯片10
• 幻灯片11
• 幻灯片12

在程序中当你需要枚举显示这些文件时，写下如下代码:

foreach (var each in Directory.GetFiles(@"c:\theFolder")) {
	Console.WriteLine(each);
}

显示结果不能说奇怪，只是说一定和你期望值有差距，如下

• 幻灯片1
• 幻灯片10
• 幻灯片11
• 幻灯片12
• 幻灯片2
• 幻灯片3
• 幻灯片4

怎么解决?竟然需要动用API, StrCmpLogicalW
增加Sort，如下

List files = new List(Directory.GetFiles(@"c:\theFolder"));
files.Sort(new StringLogicalComparer());
foreach (var each in files) {
	Console.WriteLine(each);
}

StringLogicalComparer代码如下:

public class StringLogicalComparer : IComparer {
	[DllImport("shlwapi.dll", CharSet = CharSet.Unicode, ExactSpelling = true)]
	public static extern int StrCmpLogicalW(string x, string y);

	public int Compare(string x, string y) {
		return StrCmpLogicalW((string)x, (string)y);
	}
}

Everything is OK. Enjoy it.

private void video_MediaEnded(object sender, RoutedEventArgs e) {
	this.video.Position = TimeSpan.FromSeconds(0);
	this.video.Play();
}

关键是需要重置video的Position。