Delete List Box Item in Dialog

[boyonmoped]

ok wut i mean is do you know how to make it delete what i have selected in the list box
sorry i wasn't so clear

basically if i select out of TEST 1 TEST 2 TEST 3, i select TEST 2

what can i run to make it delete TEST 2 and leave TEST 1 and TEST 3 still in it

Thanks for fast response