The class provided for date & time data type in ADO Wrapper API is Proud.CPnTime. Here shows how you can use it.
Proud::CPnTime t(2009,1,2,3,4,5);
cmd.Parameters[1] = t;
...
Proud::CPnTime t2;
t2 = cmd.Parameters[2];
t2.Format(L"%x");
int year = t2.GetYear();