spread.options.highlightInvalidData = true;
//The formula validator is valid if the formula condition returns true.
var dv = GC.Spread.Sheets.DataValidation.createFormulaValidator("A1>0");
dv.showInputMessage(true);
dv.inputMessage("Enter a value greater than 0 in A1.");
dv.inputTitle("Tip");
dv.showErrorMessage(true);
dv.errorMessage("Incorrect Value");
activeSheet.setDataValidator(0, 0, 1, 1, dv, GC.Spread.Sheets.SheetArea.viewport);

activeSheet.bind(GC.Spread.Sheets.Events.ValidationError, function (sender, args) {
    if (args.validator.showErrorMessage()) {
        if (confirm(args.validator.errorMessage())) {
            args.validationResult = GC.Spread.Sheets.DataValidation.DataValidationResult.retry;
        } else {
            args.validationResult = GC.Spread.Sheets.DataValidation.DataValidationResult.forceApply;
        }
    }
});