Take a look at the textBoxDialog function in mprompt.e
Here's a sample.
   _str initalValue = 'Change this';
   int checkValue = 1;
   int res = textBoxDialog("Sample Title", 0, 0, '', '', '', 'Sample Prompt:'initalValue, '-CHECKBOX Sample Check:'checkValue);
   if(res == 1)
   {
      message('The user chose ['_param1'] and checkbox state is '_param2);
   }