you can... if you believe that the dll on the users computer provides all the functions needed by your applications. Otherwise user will see some nice windows message announcing that the spicific function cannot be found in the msvcrt.dll so the application should be closed.
you can use dumpbin with the /imports parameter to determine what functions from what dlls are imported by the exe or dll
search for the msvcrt.lib - this file is used by linker and try to understand what dll it is correlated
