Barcode Forums by Morovia

Could u please tell me where the function prototypes are listed for windows dll?
http://www.morovia.com/font/support/font-dll.asp

All the function prototypes are list in this article, Function Prototype section.

http://www.morovia.com/font/support/font-tool.asp

I am trying to call EAN13(string ls_value) from PowerBuilder. However It creates an error calling. Do you know what datatype these functions return and is the barcode returned by reference?

Here is how I declared it:

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function integer ean13(ref string text ) LIBRARY "mrvFontTools.dll"

All the functions take a prototype:

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string Function(ref string data)