LPCSTR - Long Pointer to a Const TCHAR string
LPCTSTR = L ong P ointer to a C onst T CHAR STR ing (Don't worry, a long pointer is the same as a pointer. There were two flavors of pointers under 16-bit windows.) Here's the table: LPSTR = char* LPCSTR = const char* LPWSTR = wchar_t* LPCWSTR = const wchar_t* LPTSTR = char* or wchar_t* depending on _UNICODE LPCTSTR = const char* or const wchar_t* depending on _UNICODE Source: MSDN