vba - How to make textbox confirm if correct number entered? -

i'm trying make message box based game requires player find hidden codes within game. problem don't know how make textbox make popup says "congratulations have entered correct codes". i'm trying have use 3 numeric codes.

how make 3 of textboxes confirm if codes entered correct?

what mean textbox pop-up?

do meant use messagebox? can done using below syntax;

msgbox(prompt[, buttons] [, title] [, helpfile, context]) 

more info msdn