Base64 signature in sapscript

Hi,
We have a base64 encoded signature (.BMP) stored as an header text in the delivery.
Do anyone know how we can write (show) this as an image (decoded signature) in the delivery note  when we are doing an preview of the delivery note in the SAP-GUI .
(The preview (printing) is done with sapscript. Version ECC 6.0 )
Best Regards
Jørn Thomassen

Hi,
as I understand this must be done manually then.
Just to give you some more explanation of my problem:
I will receive delivery data from handheld devices. Data also contains signatures (originally a .bmp image) which is encoded into Base64 text. When this comes into R/3 I want a method to decode this text string back to the original .bmp image. But I was hoping I don't need to do this manually with every signature.

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