Click Insert tab Block Definition panel Block Editor.At the Command prompt, enter BEDIT.
In the Block Editor, in the Block Authoring Palettes window, Actions tab, click the Lookup Action tool.
In the Block Editor drawing area, select one or more lookup parameters to associate with the action. (You can associate only a lookup action with lookup parameters.)
Specify the location of the action.
In the Property Lookup Table dialog box, complete the table as necessary.
Click OK.
Click Block Editor tab Open/Save panel Save Block.At the Command prompt, enter BSAVE.
If you are finished using the Block Editor, click Close Block Editor.
Block Definition panel 
At the Command prompt, enter BEDIT.
At the Command prompt, enter BSAVE.