Question

I just want to expand this following method into something more generic, which should accept any kind of argument and display it using MessageBox():

void alert(char *item)
{
  MessageBox(NULL, item,  "Message", MB_OK | MB_ICONINFORMATION);
}

Can anyone help?

Answer 1

#include <sstream>
template<typename T>
void alert(T item)
{
//this accepts all types that supports operator << 
  std::ostringstream os;
  os << item;
  MessageBoxA(NULL, os.str().c_str(),  "Message", MB_OK | MB_ICONINFORMATION);
}

//now you need specialization for wide char
void alert(const wchar_t* item)
{

  MessageBoxW(NULL, item,  "Message", MB_OK | MB_ICONINFORMATION);
}