Why use 'Protected Overrides Sub OnPaint'?

[Mateus]

Hi All,

A real noob question here that hopefully has a simple answer!

Why, when drawing graphics, do most online guides recommend using Protected Overrides Sub OnPaint (ByVal e As PaintEventArgs) rather then the standard paint call an object? :uncomfortableness:

I'm drawing graphics (bitmaps, lines, squares, etc) but whether I put the code in Form1_Paint or in the above doesn't seem to matter.

So why should I use Protected Overrides Sub OnPaint (ByVal e As PaintEventArgs)?

Cheers,
M.
eaceful:

 

[JohnH]

To overrie or to handle?

 

[Mateus]

Ok... but I realise this all relates to inheritance but what is the advantage of overriding the OnPaint handle if an object already has Paint functions (e.g. PictureBoxes, Forms and Labels)? :ambivalence:

Thanks,
M.

 

[JohnH]

That is already explained in that article, if you create derived classes use the protected On-methods internally, externally there is no other option than to handle the event.

 

[Mateus]

Very sorry, I didn't realise your first reply was a link!

I'll read it now,
Thanks!