How to call enumerated data type of unmanaged code inC#?

I have a function of pborca80.dll with the following syntax: int PBORCA_LibraryEntryExport ( HPBORCA hORCASession, LPSTR lpszLibraryName, LPSTR lpszEntryName, PBORCA_TYPE otEntryType, LPSTR lpszExportBuffer, LONG lExportBufferSize ); where PBORCA_TYPE is a enumerated data type. How can I call this function through the C# code? Please send me the reply at the earliest