error #6683: A kind type parameter must be a compile-time constant

I'm using the free Visual Studio 2013 with my Intel 2016 Fortran Compiler and I get the error #6683. Here is a code segment (just a part of my code) that demonstrates the errors:

interface
   integer*4 function CreateWindowEx (dwExStyle,lpClassName,lpWindowName,dwStyle,     &
                                      x, y, nWidth, nHeight, hWndParent, hMenu,       &
                                      hInstance, lpParam )
     !DEC$ ATTRIBUTES STDCALL, ALIAS : 'CreateWindowEx' :: CreateWindowEx
     use IFWIN
     Integer(DWORD),intent(in)::  dwExStyle
     Integer(LPCTSTR),intent(in)::   lpClassName
     . . . more after this

error #6683: A kind type parameter must be a compile-time constant.   [LPCTSTR]
            Integer(LPCTSTR),intent(in)::   lpClassName
           ------------^

If I declare the function to return a HWND then it gets an error too.

Brooks V