Form Entering Negative Only

[rciolkosz]

Where and how would I put an expression or validation to display a negative
number in the form when entering?

 

[Bk_Si]

use the "After Update" event of the text box and try something like
if txtSomeName.text<0 then
msgbox "You have entered a negative number"
txtSomeName.setfocus
txtSomeName.text=""
end if