MsgBox to inform me that a txt box in less than zero on my form

[MFS]

Hello,
Still learning but progressing . . . .
Needing help with some VB to have a MsgBox appear when a numeric value in a textbox is less than zero. Where the user must adjust the value to a positive number before allowing the user to advance to the next textbox.
How easily could this be done?
Could someone help me with the VB?

Thank You,

Speck

[June7]

Is this to validate user input? Could set the textbox ValidationRule and ValidationText properties - no VBA needed.

Or is user editing records that already have negative values in this field?

[MFS]

No, the user is entering data, And I want to ensure that numbers entered are always greater than 0.
I will try what you have suggested.

[MFS]

That will work perfectly, Thank You June7