ATTR_NUM_CTRLS
| Type: | Panel attribute | 
| Description: | The number of controls in the panel you specify. The panel attribute ATTR_PANEL_FIRST_CTRL returns the lowest control ID that exists in the panel. When you call GetCtrlAttribute on this first control ID, ATTR_NEXT_CTRL returns the next higher control ID in the panel. On the last control, ATTR_NEXT_CTRL returns zero. Use the panel attribute ATTR_NUM_CTRLS to get the total number of controls in a panel. | 
| Restrictions: | Not settable. | 
| Data Type: | integer | 
| LabWindows/CVI Compatibility: | LabWindows/CVI 3.0 and later | 
