Object DBF Library 3.1. 
-----------------------

The whole power of Delphi's native tools for databases manipulation 
is not required in small single-user applications. To my mind, there 
are many cases when there is no need to depend on many IDAPI DLLs if 
your program works with few tables on your PC. 


HISTORY 


The current version 3.1 (July, 1999) has several new features in 
comparison with 3.0 (November, 1997). 

1. Arbitrary blob data may be stored in memo fields now. In dBase 
III 1Ah symbol is treated as termination char in memo fields, so we 
must always take care of the absence of such symbols memo fields, 
otherwise the first one in the field would be estimated as its end. 
Text data never contain such symbols, but blob fields like images, 
archives and so on have not this limitation. In version 3.1 of ODBF 
you have 4 new methods: GetBlobToBuffer, GetBlobToFile, 
SetBlobFromBuffer and SetBlobFromFile. Arbitrary blob data can be 
encoded/decoded by them in/from pseudotext which is stored in memo 
fields. 

2. Problem of year 2100 was solved. In previous versions 2100 was 
considered to be a leap year, date 2100/02/29 was admissible and 
procedure NextDate and function CountDays could return incorrect 
result. Boolean function LeapYear was added to ODBFTool unit because 
standard IsLeapYear function is not available in early versions of 
Delphi. 

3. Buffers for storing file names were increased. Now the size of 
full file name may be 254 bytes, in previous version maximum full 
name length was 80 symbols. 

4. Problem of pathnames with point was solved. In ODBF 3.0 DBF-table 
with memo-fields couldn't be correctly opened by USE method if at 
least one point ('.') took place in the path names of DBF and DBT 
files (E. g., 'C:\MY.DIR\TABLE.DBF'). 


LIST OF FILES


The trial version of ODBF library consists of the following files.

\
	FILE_ID.DIZ	Product description 
	README.TXT	This file 
	REGISTER.TXT 	How to register 
\DELPHI1
	ODBFREG.DCR	Resource file with components' icons
	ODBF.DCU	Compiled D1 unit ODBF
	ODBF_FD.DCU	Compiled D1 unit ODBF_FD
	ODBF_FDE.DCU	Compiled D1 unit ODBF_FDE
	ODBFTOOL.DCU	Compiled D1 unit ODBFTOOL
	ODBF_FD.DFM	Form file for ODBF_FD unit
	ODBF_FDE.DFM	Form file for ODBF_FDE unit
	ODBFREG.PAS	Source code of ODBFREG unit
\DELPHI2
	ODBFREG.DCR	Resource file with components' icons
	ODBF.DCU	Compiled D2 unit ODBF
	ODBF_FD.DCU	Compiled D2 unit ODBF_FD
	ODBF_FDE.DCU	Compiled D2 unit ODBF_FDE
	ODBFTOOL.DCU	Compiled D2 unit ODBFTOOL
	ODBF_FD.DFM	Form file for ODBF_FD unit
	ODBF_FDE.DFM	Form file for ODBF_FDE unit
	ODBFREG.PAS	Source code of ODBFREG unit
\DELPHI3
	ODBFREG.DCR	Resource file with components' icons
	ODBF.DCU	Compiled D3 unit ODBF
	ODBF_FD.DCU	Compiled D3 unit ODBF_FD
	ODBF_FDE.DCU	Compiled D3 unit ODBF_FDE
	ODBFTOOL.DCU	Compiled D3 unit ODBFTOOL
	ODBF_FD.DFM	Form file for ODBF_FD unit
	ODBF_FDE.DFM	Form file for ODBF_FDE unit
	DCLODBF3.DPK	Delphi 3 package source
	ODBFREG.PAS	Source code of ODBFREG unit
	DCLODBF3.RES	Package resource file
\DELPHI4
	ODBFREG.DCR	Resource file with components' icons
	ODBF.DCU	Compiled D4 unit ODBF
	ODBF_FD.DCU	Compiled D4 unit ODBF_FD
	ODBF_FDE.DCU	Compiled D4 unit ODBF_FDE
	ODBFTOOL.DCU	Compiled D4 unit ODBFTOOL
	ODBF_FD.DFM	Form file for ODBF_FD unit
	ODBF_FDE.DFM	Form file for ODBF_FDE unit
	DCLODBF4.DPK	Delphi 4 package source
	ODBFREG.PAS	Source code of ODBFREG unit
	DCLODBF4.RES	Package resource file
\HELP
	\DELPHI3
		ODBF.CNT	Help contents for Delphi 3 
	\DELPHI4
		ODBF.CNT	Help contents for Delphi 4
	ODBF.HLP	Help file 
	ODBF.KWF	Keyword file for Delphi 1 and 2 
\SAMPLES
	\PHOTOS 	Image blob sample project for Delphi 3 and 4 
		PHOTOS.DBF
		PHOTOS.DBT
		PHCPRT.DFM
		PHLIST.DFM
		PHSELECT.DFM
		PHOTOS.DPR
		PHCPRT.PAS
		PHLIST.PAS
		PHSELECT.PAS
		PHTOOLS.PAS
	\TABLEDIT	Common sample project for all Delphi versions 
		TEST.DBF
		TEST.DBT
		ODBFCPRT.DFM
		ODBFFORM.DFM
		ODBFMEMO.DFM
		TABLEDIT.DPR
		ODBFCPRT.PAS
		ODBFFORM.PAS
		ODBFMEMO.PAS
\SOURCE 
	ODBF.INT	Interface part of ODBF unit
	ODBFTOOL.INT	Interface part of ODBFTOOL unit
	ODBF_FD.PAS	Source code of ODBF_FD unit
	ODBF_FDE.PAS	Source code of ODBF_FDE unit


AUTHOR 


Leonid V. Schavelev
Russia
E-Mail 		Leonid@iname.com
		Leonid@polytech.ivanovo.su
Internet	http://www.polytech.ivanovo.su/~leonid
		http://schavelev.webjump.com/