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**PROP:NoTheme** can be applied to a SHEET control.  It prevents the Operating System theme color from being applied to the SHEET /TAB controls allowing you to set the Colors.

The Templates provide support to apply PROP:NoThemed to all SHEET controls in the Application. To activate the template support go to Global Properties->Actions->App Settings->Application Manifest and turn on the checkbox for "SHEET controls do not use the OS Theme color".