New a Dialog with CEdit and initial string problem

I want to DoModal() a new dialog with a CEdit, and there is one initial string inside the CEdit.  It's not easy to put  the string in the CEdit and show it when DoModal().  Anyway, the web link (http://stackoverflow.com/questions/11715888/domodal-does-not-show-dialog-but-does-its-work ) show us how to do it.