If your program is not using Unicode as the default, then "char *" is the same thing as LPCTSTR; the compiler will see the same thing, the only difference is that the preprocessor replaces LPCTSTR with "char *".
Your program however is probably using Unicode as the default. If so, then you need to convert the non-Unicode "char *" string to a Unicode string. There are many ways to do that and the most convenient solution for you depends on what your program is already using. If your program is using MFC then there is a MFC solution. If your program is using the CLI (.Net) then there is a different solution using that. If your program uses the C++ standard classes (std namespace) then there is a solution using that. There is also a solution using the C runtime and anotehr using the Windows SDK.