Install License key

I have recently purchased the do diagram, I have got my license key and i have installed the same on my application also, now i am getting an error while i am using the application.
It says I need to link my license using lc, can anyone help me in doing this?

Thanks and Regards,

You can get documentation for Microsoft’s License Compiler (LC.EXE) by executing “LC /?” in a Visual Studio Command Prompt window.
You can find examples of this in the command file BuildSamples.bat, in the Samples subdirectory of the installation.