how to preview video camera from tv tuner in vb.net

how can i preview / record or only preview video from my tv tuner card in vb.net开发者_JS百科....i have usb stick deny tuner card in my laptop

A lot of TV capture cards, webcams etc support DirectShow. A few months ago I was looking at how easy it would be to capture video from C# and it can be done. DirectShow.NET is a wrapper around most of the DirectShow APIs. There are also a couple of commercial DirectShow controls for .NET like VisionLAB. I've not used them myself and it looks pretty complicated, but it can be done.

Otherwise, as Red-nosed unicorn suggests you might need to start reading the vendor's documentation.

That depends entirely on your TV card. Does the vendor provide an API documentation? This would specify how the TV card can be addressed programmatically.