====== hfzOpen ======

===== Description =====

Open a HF2/HFZ file for reading or writing. 

===== Function prototype =====
<code>
hfzFile* hfzOpen(const char* lpFileName, long Format, const char* lpMode);
</code>

===== Arguments =====
^ Name ^ Type ^ Description ^
| lpFileName | const char* | The name of the file to be opened.  |
| Format | long | The type of file to be opened. May be either LIBHFZ_FORMAT_HF2 (uncompressed) or LIBHFZ_FORMAT_HF2_GZ (compressed). |
| lpMode | const char* | The access mode to be used. May be "wb" (for writing), or "rb" (for reading). |


===== Return value =====

Null if an error occurred (file could not be opened), and otherwise a valid non-null handle to a hfzFile struct.

===== Comments =====
None.