[Boost-users] A question on member functions when using lambda expression. Can anyone with kindness help me?

Subject: [Boost-users] A question on member functions when using lambda expression. Can anyone with kindness help me?
From: fmingu (fmingu_at_[hidden])
Date: 2009-07-19 04:17:17

I am using Dev-C++ with lambda expression and building a DLL.
In Dev-C++, when the program is used as a exe.It works fine.
But I want to make it a class (i.e.classA in the following)in a DLL for other exes to use it.
And the error occured:
In dll.cpp:
................
void classA::a()
.........................
 (while_loop(bind(&isprime,_1)==false, ++var(result))(middlevalue);
......................
where bool isprime(int) is also a member function of classA.
But the complier told me that:
ISO C++ forbids taking the address of an unqualified 
   non-static member function to form a pointer to member function. 
I do not know how to solve it.
Can anyone with kindness help me?