External environment refers to the major factors and forces outside the organization that have the potential to significantly affect the performance of an organization. External environment is divided into two parts i.e. mega environment or general environment and specific or task environment.
_tcscat is a C function, to concatenate C-style strings; CString is a class (which has built in concatenation via operator+), not a C-style string.
WINMAIN and main() in C++ (Extended) 1  The C and C++ standards require any program (for a âhostedâ C or C++ implementation) to have a function called main, which serves as the program's startup function. 2  plus possible implementation-defined signatures (C++11 Â§3.6.1/2) except that the result type must be int.