🚀 go-pugleaf

I wrote:

>> You specified a member function of a structure to 
>> Windows as a callback function.  Windows is not 
>> party to the internal configuration of your program
>> and has no facilities to call a non static member 
>> function in the context of whatever instance of that 
>> structure you intended to be used.

You replied:

>If you have got Borland C++ 4.02 or greater and Look 
>for windows examples; it exactly contradicts you 
>statement.

That is not true.  

You described a problem and asked what is wrong.  I told 
you what was wrong. 

Go to your books on C++.  Investigate what they say about
function pointers to non-static member functions and how
they are different from function pointers to normal, 
non-member functions. 

You are trying to specify a non-static member function 
as the window procedure address in the lpfnWndProc 
element of a WNDPROC structure.  The line generates an 
error because what is assigned to the element is not of 
the same type.  The address of a non-static member 
function involves not only the address of the function 
code but also that of the instance of the structure or
class of which it is a member.  The lpfnWndProc variable
is not a compatible type to the address of a non-static
member functon of a class or structure.

.  Ed 

>FireHead <satishA82@linuxmail.org> wrote: