4D Plugin API

version 2003

typedef enum
{
   eAutomatic   = -1,   // Show layouts according to platform GUI
   eMacintosh   = 0,   // Show layouts using Macintosh GUI   
   eWin31   = 1,   // Show layouts using Windows 3.1.x GUI
   eWin95   = 2   // Show layouts using Windows 95 GUI
} PA_PlatformInterface;

The eWin31 value exists even if 4D 6.7 does not run under this OS since you can emulate its interface.