how to get the path of dll from registry

Hi,
I want to retrieve the path of a dll from registry.When we search a dll,exe etc from Find sub menu of registry editor ,it searches and gives the complete path of that one in Default value name.Now all this thing i want to do from my application.I have only one information that is the name of a Dll for example Project1.dll ,now i have to retrieve the path of this one.The restrictions are that i have only the name of dll,nothing else.It is possible becoz find menu of registry editor does it,now how to do manually.if it is possible in VC++,com ,then please reply
thanks