Converting from DPW to FlexWin

Only a few changes are needed in order to convert from Nets Payment Window to FlexWin


POST destination

The first step is to change the URL so that the form is posted to:

Please refer to the integration checklist for form examples and thorough explanation of the steps you need to follow in order to complete the integration.


Input and output parameters

Some parameter names and formats have to be changed. Please refer to the input parameters and output parametes to make sure that the correct parameters are used.

Please contact Nets support, if you have any questions.


MD5 encoding

FlexWin uses MD5 rather than HMAC for protection against data tampering to and from the payment window. This requires that a new MD5 key is generated in the Nets administration (under Integration -> MD5 key). For information about how to use MD5, please have a look at the MD5 parameter on the MD5 calculation page.



All parameters in the callback are now sent in the ISO-8859-1 char-set instead of the UTF-8 char-set.

DPW Form

Here is an example of a Nets Payment Window form. The differences that should be changed are highlighted.


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