Users Read As Little As Possible
Most users ignore message boxes unless they have to make a choice.
Users almost never read the text in a dialog box with only an [OK] button.
In a dialog with two or more buttons, users will:
- Take action based on the button captions if possible
- Otherwise take action based on the button captions and title if possible
- Otherwise take action based on skimming the dialog text
- If all else fails, actually read the full message
Moral of the Story
Avoid [OK] only dialog boxes.
Keep your dialog messages clear and concise.
Explore alternatives such as task dialogs or custom Access forms.
Consider keeping a log of the messages your program displays. (For debugging purposes and to respond to the inevitable, "I never saw that message!" protests from users.)