CString类的字符串如何转成char*

使用LPCTSTR类型转换后即可将CString类的字符串转为char*.

MSDN中的相关说明如下：

CString objects also have the following characteristics:

• CString objects can grow as a result of concatenation operations.
  
• CString objects follow “value semantics.” Think of a CString object as an actual string, not as a pointer to a string.
  
• You can freely substitute CString objects for const char* and LPCTSTR function arguments.
  
• A conversion operator gives direct access to the string’s characters as a read-only array of characters (a C-style string).

Tip   Where possible, allocate CString objects on the frame rather than on the heap. This saves memory and simplifies parameter passing.

具体实现如下：

aa=   (LPSTR)(LPCTSTR)bb;

另外还有一种方法：
aa=bb.GetBuffer(bb.GetLenth());