by Sean Patrick (Software Engineering and Networking (1 Submission)
Category: Databases/Data Access/DAO/ADO
Compatability: Visual Basic 4.0 (32-bit)
Difficulty: Unknown Difficulty
Originally Published: Tue 28th December 1999
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
Keep competitors and clients out of your databases with VB front ends. If you view an Access Database in notepad you will see "Standard Jet
API Declarations
'*******************************************************************'
'Module Name: modProtectAccess
'
'Purpose:Changes the header of an access database to keep competitors
' and clients out of your databases with VB front ends.
'
'Author: Sean - Software Engineering and Networking ([email protected])
'*******************************************************************'
Public Enum LockDatabase
LockData = 1
UnlockData = 2
End Enum
VBcoders
'*************************************************'
'Purpose: Changes the header of an access database.
'*************************************************'
Dim iFreeFile As Integer
Dim iLoop As Long
Dim lLoc As Long
iFreeFile = FreeFile() 'Get free file #
Open sPath For Binary As #iFreeFile 'Open specified file for binary I/O.
lLoc = 1 'Set starting byte location
Select Case iAction 'Set the header string for the appropriate action.
Case 1
sString = "MYDB Database!!" 'Modified header data.
Case 2
sString = "Standard Jet DB" 'Default header data.
End Select
For lLoop = 5 To 19 'loop through and update byte positions 9 through 15.
Put #iFreeFile, lLoop, Mid$(sString, lLoop - 4, 1)
Next lLoop
Close #iFreeFile
End Sub
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