>XP Theme proptery for forms and controls ... Does anybody have a preference to it being .t. or .f., and why.
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>I just took over an app developed in Win2K. Theme property never a conderation. Everything (color) is washed out in the default XP environment.

The property specifies does controls use XP theme design in XP or use old-style design. XP themes use graphics resource dll to customize look of most standard controls.
The only reason to set it to false is compatibility issues.
Some old user interfaces need minor modification to support XP themes. This is especially about pageframes where BackStyle for most controls must be set to transparent.