PICT Control is a control definition function (CDEF) designed to implement controls capable of adopting the appearance of any picture resource (PICT), or any series of PICTs. Thus it allows the Macintosh programmer to create an extraordinary variety of apparently new control types – on the fly - without writing (or debugging) a single line of specialized additional code.
PICT Control was created to operate in complete conformance with Apple’s Control Manager specifications. As a result, from the user’s standpoint, any PICT Control will behave in a familiar manner – hiliting and unhiliting as one drags on and off the control, for instance. From the programmer’s standpoint it also behaves in a familiar manner – the same Control Manager routines used to manipulate conventional controls are all that are necessary to manipulate PICT Controls.
