RICHEDIT控件的选中是什么怎么回事？
我的调用SetParaFormat（）设置，但是我根本就没有选中任何一行，但是在里面显示的字体还是有效果呢？
难道默认的是选中全部？
[解决办法]
SetParaFormat应该是设置段落格式，所以跟你选没选中无关
取消全选的话，去查查SetSel的2个参数是干嘛的
[解决办法]
void SetSel( long nStartChar, long nEndChar );
nStartChar
Zero-based index of the first character for the selection.//首个字符的索引值
nEndChar
Zero-based index of the last character for the selection.//末尾字符的索引值
To select all the text in this CRichEditCtrl object, call SetSel with a start index of 0 and an end index of – 1//全选就是SetSel(0,-1);
[解决办法]
The selection includes everything if the beginning (cpMin or nStartChar) is 0 and the end (cpMax or nEndChar) is – 1.
