L prefix for strings in C++

Question

I have a static library. This library have the following function defined

int WriteData(LPTSTR s)

The sample to call the function is

Answer 1

I would wrap your strings in the _T(...) macro. That way its portable between ANSI and UNICODE builds.

Note that you are using the portable string type - LPTSTR - note the T. It will change between ANSI and UNICODE based on build settings.