I have a VB.net windows application which plays media using the wmp activex control from WMPSDK10.

The problem is, when installed on a windows machine (with XP OR Vista) with Media Player 11 installed, the application works fine, but windows Media Player 11 screws up.

This is because the wmp.dll for media player 10 is registered for the application at install.  media player 11 uses a different wmp.dll (obviously) as its a different version.

If i re-register the v11 wmp.dll, media player works again, but the vb.net application screws up.

I cannot get hold of an SDK for media player 11, all the links to it on Microsofts site lead to a deadend.

Is there any way that I can get both dlls working on one machine?

Try this:

Rename your V10 .dll.

Add the V10.dll to your project as part of the application you are working on, from inside your IDE

When deploying ensure that the V10 .dll is installed on your target machine.

let me know if this works :)