CANCEL -VBA property

How to close the CANCEL property on the exit event of a TextBox? Is that the Textbox is inside a Frame, along with another 5, in the event "exit" was assigned the value True to the CANCEL property if the textbox is empty, but when I click on a "clean" command button outside the frame, after the textbox is empty, if you return to the frame in another textbox, the empty textbox message of the previous textbox will appear. I want to undo this warning by clicking the "clean" button!