FoxPro Barcode Font Encoder Tutorial
This FoxPro Barcode Tutorial shows how to use barcode fonts in Microsoft
Visual FoxPro 6 forms and reports.
Using Self Checking Barcode Fonts, MICR &
fonts are compatible with FoxPro and may be used with ease. To use
a self-checking font such as
an asterisk "*" will need to be inserted before and after the bar code
data encoded. Therefore, when encoding TEST3OF9 in a barcode,
the text will be displayed as *TEST3OF9* in a label on the form or
in a field in the report. The Code 39 font should be selected for a label
on a form or for field in a report.
- In this example, a dynamic Code 39 barcode field will be added
to a Visual FoxPro 6.0 report with IDAutomation's
39 barcode font. The sample assumes that the data to be encoded
in the barcode is stored in the "Code" field of character type in
the "Items" table.
- First, install one of IDAutomation's Code 39 barcode font packages
downloading a demo or
ordering a license.
- Open the report for editing. Select the "Field" button in the
report controls toolbar and click on the report layout where the
bar code should be displayed. This will open a dialog box for specifying
the properties for new report field. In this example, the Code field
content is the one selected to include in the barcode. Because the
start and stop characters required for Code 39 need to be added,
the following expression in the dialog box for report field properties
needs to be entered.
- Resize the new field to the required size of the field. With
the field selected, choose Format - Font... in the menu
and choose one of the Code 39 Barcode Fonts. In this example, the
IDAutomationHC39S font is used, which is a "human readable"
font provided in the
39 Font Advantage Package. In this example, Format -
Align - Center Horizontally and Center
Vertically is chosen so the barcode will appear in the
middle of the field and then change the font size to 14 so it can
be easily scanned.
- Now, when the Items table is prepared and contains some data,
preview of the report should display a bar code in the Barcode column
in the report.
- The process to display a barcode on the form using barcode fonts
will require some coding. To do this, put a TextBox control on the
form, specify .T. for ReadOnly property for it, then set the Font
for displaying to the Barcode font with size 14. Set the Alignment
property to "2 - Center". After that, specify the expression for
displaying in the ControlSource property of the text box. This is
not possible in design time, so it needs to be assigned in run time.
Using the FoxPro Barcode Module or Source Code
- The program module and source code for FoxPro calculates the
start, stop and check digits for the barcode and returns a character
string, that when combined with the barcode font, creates a correct
- Download the
IDAutomation-prg.txt file and save it as IDAutomation.PRG.
- Add this file as a program module to the VFP project, set it
as a procedure file using SET PROCEDURE TO... ADDITIVE command somewhere
in the main (startup) code of the project and access the function
in the application as necessary. This is demonstrated in the following
Visual FoxPro Barcode Sample Project.
- Place the appropriate expression in the dialog box for report
field properties. For example, when using the Code 128 barcode font,
call a code 128 function defined in the program module. There is
not really much difference in defining properties in this method
compared to Method 1, except
the expression is now a function defined in our program module.
LICENSE NOTICE: This source code may be incorporated
in an application only if a valid license from IDAutomation.com, Inc.
is acquired for the associated font and the copyright notices are not
removed from the source code. Redistribution of IDAutomation's fonts
and components requires a Developer License.