CString

In C++, there exist several functions to manipulate strings that are declared as char var; The functions such as strncpy, to copy one string to another, strdot to convert a string to decimal format and many others. However, if a string is declared as a CString, a format allowed for C++, the same utilities will not work, one gets the message by the compiler that "cannot convert argument x from char to CString. Therefore, the question is, are there existing functions that are similar only that can be used on CString variabels? Please let me know, thanks, Sid Kraft.