Using InputBox to define a constant

[AidanEnos]

I'm having troule here is my string...

Const Monday = InputBox("Enter Monday's Date", "Enter Monday's Date mm/dd/yy", 1 / 1 / 1980)

This is in MS Excel 97 SR-2. It's in the Declarations section... it's telling me there is a compile error, Constant Expression required.

I have no idea what it means!

AidanEnos