Module-Level Variables in Excel VBA

The following module-level variables are declared in Module1:

Option Explicit
Dim FirstActive As Boolean
Dim FirstShape As Shape
Dim GameActive As Boolean

Explanation:

• The Boolean variable ErstesAktiv stores whether the first image (puzzle piece) has already been selected during the swapping process.
• The variable Erstes is a reference to the first selected puzzle piece (Shape) involved in the swapping operation.
• The Boolean variable SpielAktiv indicates whether the game is currently running and not yet finished. This is important to manage cases when the user presses the START button again during an ongoing game.