ATTR_CALLBACK_DATA (Control)
| Type: | Control attribute |
| Description: | A pointer-width value that is passed to the control callback function. The value can be a pointer to user data. If the callback is chained or you intend to chain the callback, use the GetChainedCallbackData and SetChainedCallbackData functions, instead of this attribute, to get or set callback data. |
| Control Types: | ActiveX controls, binary switches, canvases, color numerics, command buttons, decorations, digital graphs, graphs, LEDs, list boxes, numerics, picture buttons, picture rings, 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 |
| LabWindows/CVI Compatibility: |
LabWindows/CVI 3.0 and later |