How can I read the keyboard buffer?

I am working on a triage tool for digital forensic investigators tackling encryption (for my dissertation) and I have decided that the keyboard buffer may be a valuable piece of evidence.

I just want to return the keyboard buffer to a textbox. Once the textbox is populated, the investigator will be able to save a text file.

One problem, I have scoured the internet and this forum for a VB script that acquires the keyboard buffer.

Is it possible? Am I missing something glaringly obvious?
Any help is greatly appreciated.

- Adam

To the best of my knowledge, the keyboard buffer isn't persisted. One can read the current buffer which includes which keys are presently pressed or not. Is that what you are looking for? If so, look at this link & has an example at bottom of that page.