MFC class framework makes possible to work easily with global variables and functions.
Let’s declare a static member variable or function in the CWinApp derived class. It is
accessible from all classes.
Example:
// MyApp.h
class CMyApp : public CWinApp { public: CMyApp(); static int g_nMyVariable; // declaration static void g_MyFunction(); // declaration ... etc ... };
// MyApp.cpp
int CMyApp::g_nMyVariable = NULL; // definition & initialization
void CMyApp::g_MyFunction() // definition { }
Now the variable and the function are accessible through the syntax CMyApp::g_nMyVariable or CMyApp::g_MyFunction from any other class…