ATTR_DIMMER_CALLBACK
| Type: | Menu attribute | 
| Description: | A pointer to the menu dimmer callback function. The callback function, type MenuDimmerCallbackPtr, takes the following form: void CVICALLBACK DimmerFunctionName (int menuBar, int panel); | 
| Menu Objects: | Menu Bars. | 
| Data Type: | pointer | 
| Default Value: | NULL | 
| LabWindows/CVI Compatibility: | LabWindows/CVI 4.0 and later | 
