struggling_coder_3203
asked on
utilizing mfc class functionality
hi all,
Is it right that you can use the functionality of a class even though you don't instantiate that class and create an object?? For example, when you use AfxGetApp() function, it returns a pointer to a CWinApp class. But if I never instantiated an object of that class, then what is it pointing to?
Is it right that you can use the functionality of a class even though you don't instantiate that class and create an object?? For example, when you use AfxGetApp() function, it returns a pointer to a CWinApp class. But if I never instantiated an object of that class, then what is it pointing to?
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If you plan to use non-static functions, definitively YES.
Functions can be defined as static and, by default, non-static.
Roughly a static function does not require any initialisation that would be performed in the constructor of the class. This allows one to call a static function of a class without it being instantated.
Give it a try - create a new class yourself and do something like in the header
static int MyStaticFn() {return 2;};
now in your prog do
int x = CMyTestClass::MyStaticFn()
x now has the value 2.
Roughly a static function does not require any initialisation that would be performed in the constructor of the class. This allows one to call a static function of a class without it being instantated.
Give it a try - create a new class yourself and do something like in the header
static int MyStaticFn() {return 2;};
now in your prog do
int x = CMyTestClass::MyStaticFn()
x now has the value 2.
ASKER
so, are all mfc classes static in a wizard generated application???????????????
ASKER