title: How can I make calculator using (native Win32 API)?
body: <p>I'm beginner in Win32Api, I tried to make calculator but I failed because of conversion of data types between each other</p>
  
  <p><strong>Example:</strong></p>
  
  <pre><code>int N1 = GetDlgItemText(WID,IDC_N1,NULL,NULL);
  int N2 = GetDlgItemText(WID,IDC_N2,NULL,NULL);
  int RESULT = N1+N2;
  MessageBox(NULL,RESULT,L"Message",MB_OK);
  </code></pre>
  
  <p>The example in above tell me the following error
  <strong>(cannot convert parameter 2 from 'int' to 'LPCWSTR')</strong></p>
  
  <p>And the reason for this error is conversion of data types between each other</p>
  
  <p>Please anybody help me </p>