I would like a boolean that tells me True, False, or not yet defined, but because it's boolean it really can't have three values.
Instead then, I should probably pick a varient but I'd like to know if a varient isn't given a value, can VBA tell me that the varient is undefined (perhaps null)?
Ie, how would I test for that? (For use in an If statement or a loop.)
Do I have to set it like: value = undefined and test for that? (Should a string be used: value = "undefined"?)
Can I set it to a null value and what code should be used for that and for the If/loop test?