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Opens an mxd or pmf file stored at the specified path.
[Visual Basic .NET]
Public Sub Open ( _
    ByVal FilePath As String _
)
[C#]
public void Open (
    string FilePath
);
[C++]
HRESULT Open(
  BSTR FilePath
);
[C++] Parameters FilePath [in]
FilePath is a parameter of type BSTR