/*
Well, I'll try to explain my problem in english.

I'm dealing with the MFC, when your receive a message, you need to do a thing like this to intercept it :
*/

ON_COMMAND(IDC_ACTIONSCAN, &FunctionAdress) //that work cause it s the way to be do

/*
What I want is to put a variable instead of FunctionAdress which will contain a function adress, it will make
my programme possible to dynamicly change the adress of the function and use a different function.
*/

ON_COMMAND(IDC_ACTIONSCAN, reinterpret_cast<AFX_PMSG>(&a_variable))  //won't work impossible to cast
//The same without macrp won't work too :
ON_COMMAND(IDC_ACTIONSCAN, reinterpret_cast<void (AFX_MSG_CALL CWnd::*)(void)>(&a_variable)) 

/*
The problem is that it don't work, impossible to cast a var of any type to a AFX_PMSG, even with a reinterpret_cast
*/

class myclass {
//[...]
	afx_msg static int a_variable;	//contain the adress of the function
	afx_msg void OnMenuModuleMenuDefault();   //it work if I use this function
//[...]
}

myclass::OnMenuModuleMenuDefault{ DoSomething() }

myclass::a_variable = //adresse of a default function, will be changed if a dll is loaded or something else