The lc.exe is not part of the Syncfusion libraries. It is shipped as part of the Framwwork SDK.
http://msdn2.microsoft.com/en-us/library/ha0k3c9f(vs.80).aspxIf that link does not appear, type lc.exe into a google search screen and click the msdn help screen link that should be among the hits.
On my system, lc.exe is found here:
C:\Program Files\Microsoft Visual Studio 8\SDK\v2.0\Bin
If you do not have any luck using lc.exe to embed the license file into your C++ project, you should submit a Direct Trac support incident so an installation support engineer can arrange a remote session to access your computer and check out why things ares not working.