It appears as though the judge will issue his decision in writing (either a simple order granting or denying the motion to dismiss, or a more detailed memorandum and opinion explaining the grant or denial). Generally, a judge will sign and date an order, and mail copies to all parties; meanwhile, the original is attached to the court file and is sent back to the clerk's office to be "entered" into the docket. The clerk then mails out another copy with the date stamp on it showing the date of entry. Your appeal time begins to run from the date the clerk enters it into the court docket, not the date the judge signed the order (there is often a lag time between the two dates). Most appeals must be filed within 30 days (you simply file a one page "notice of appeal", followed later by a brief or memorandum, depending on the appeal type), but you do not describe the type of case, and there are some appeals which have shorter filing deadlines (for instance, an appeal from a landlord-tenant eviction case from District Court to Circuit Court).