关于MFC打印机打印的问题

各位大侠，我现在遇到一个问题是这样的：我用DrawText画多行字符串的时候，写出来的字符串是 
                                                                          aaaaaaaaaaaaa 
                                                                          bbbb 
但是用打印机打印预览或者用纸张打印出来时，显示的却是： 
                                                                          aaaaaaaaaa 
                                                                          aabbbb 
请大家帮忙解决一下