Demo version and locense key

[jkpieterse]

Hi all,

Searched the forum, but did not find what I was looking for.

Here is what I'd like to achieve:

- Ask the user for a license key (I'll get that sorted)

If no or invalid license key:

- tell user and ask if OK to install Demo version
- If OK, --> install Demo.dll

If valid license key then:

- check if Demo.dll is installed
- If so, remove (and unregister)
- install Licensed.dll

Could someone please outline the steps to achieve this task and/or point me to information I'd need to get this done?