> I'm genuinely surprised Microsoft's attitude towards "wndprocs don't have a context pointer"
They designed windows classes to be reusable, and assumed many developers going to reuse windows classes across windows.
Consider the following use case. Programmer creates a window class for a custom control, registers the class. Designs a dialog template with multiple of these custom controls in a single dialog. Then creates the dialog by calling DialogBoxW or similar.
These custom controls are created automatically multiple at once, hard to provide context pointers for each control.
They designed windows classes to be reusable, and assumed many developers going to reuse windows classes across windows.
Consider the following use case. Programmer creates a window class for a custom control, registers the class. Designs a dialog template with multiple of these custom controls in a single dialog. Then creates the dialog by calling DialogBoxW or similar.
These custom controls are created automatically multiple at once, hard to provide context pointers for each control.