how to add custom properties to microsoft visio template (.vtx)

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C#

Hi Every one,

I am new to this, so I was hoping if someone could point me in the direction of a tutorial or a code sample. i have created a blank visio template using interop visio dll now i need to add custom properties to microsoft visio template (.vtx). I have seen a bunch of stuff on the web, with this particular piece but nothing was proper. Does anyone know how to do this in C#.

Any help is greatly appericaited.

thanks in advance