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Returns a Boolean value (TRUE) if a Windows theme is currently active. This is usually a SYSTEM, READONLY property, but can also be used to test a specific control.

**Example:**

**IF SYSTEM{PROP:ThemeActive} = TRUE   !If a theme is active**

**!get new font size and set for target controls**

** Do ProcessNewFontSize  **

**END**

** **

**!or:**

**IF ?Button{PROP:ThemeActive} = TRUE   !If a theme on a button is active**

**!get new font size and set for target control**

**  ProcessNewFontSize(?Button)**

**END**