# ATTR_CALLBACK_FUNCTION_POINTER (Control)

Type: | Control attribute
Description: | A pointer to the callback function for the control.
Control Types: | ActiveX controls, binary switches, canvases, color numerics, command buttons, decorations, digital graphs, graphs, LEDs, list boxes, numerics, picture buttons, picture rings, pictures, radio buttons, rings, numeric slides, ring slides, splitters, strings, strip charts, tab controls, tables, text boxes, text buttons, text messages, timers, toggle buttons, trees.
Data Type: | pointer
Default Value: | NULL