From Xojo Documentation
The currently selected operating system text color.
|result||Color||The color used for drawing text.|
This value is useful when you are using Canvas controls to create custom controls. When drawing objects, use this color as the ForeColor value when drawing text.
The DisabledTextColor returns the system color for drawing disabled text. The default is a gray.
This value can be changed by the user, so you should access this value in the Paint event handler rather than storing the value.