Gets and sets the border style surrounding the Project Tree window. The value is a number between 0 and 4, according to the following options.
§ 0 = None
§ 1 = Solid
§ 2 = Three-dimensional border style
§ 3 = Border with a sunken edge
§ 4 = Double border
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 BorderStyle  | 
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 C#  | 
 
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 int BorderStyle { get; set; }  | 
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 C++  | 
 
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 HRESULT BorderStyle([in] long pstyle) HRESULT BorderStyle([out, retval] long* pstyle)  | 
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