Re: [Boost-users] Windows API callback, using boost::bind

Subject: Re: [Boost-users] Windows API callback, using boost::bind
From: Bill Buklis (boostusr_at_[hidden])
Date: 2010-10-29 13:10:07

hi,

 

We have a class and it has a member function. When this function is called,
it calls a Windows API. One of the argument of the windows API is a callback
function. Naturally this callback function has to be a *non member*
function. Is there any way by which I can pass a *member* function in the
place of callback function. I heard about boost::bind, with bind is it
possible?

 

Thanks,

  Lloyd

 

Since most Windows callback functions have a user passed in DWORD_PTR (or
LPARAM) as one of the arguments, what I typically do is use a static member
function of the class as the callback function and pass the "this" pointer
as the DWORD_PTR. The static member function now has full access to the
class and can either use member variables directly (via the passed in
pointer) or forward the callback to a true member function.

 

 

-- Bill --