Dear experts

I have data set which is for validation of error on both sheet build A and B, i need vba code to list validation so minimize by pick unique values Page,Testcase,T estid
i want shown values of testid once done unique validation of textbox3 from both sheet A and B

for e.g
"if i select page = ASIA In Listbox1 then listbox2 show all unique values towards ASIA, then
if i select testcase=...