C# Definition:

enum SysCommands : int
{
     SC_SIZE     = 0xF000,
     SC_MOVE     = 0xF010,
     SC_MINIMIZE     = 0xF020,
     SC_MAXIMIZE     = 0xF030,
     SC_NEXTWINDOW   = 0xF040,
     SC_PREVWINDOW   = 0xF050,
     SC_CLOSE    = 0xF060,
     SC_VSCROLL      = 0xF070,
     SC_HSCROLL      = 0xF080,
     SC_MOUSEMENU    = 0xF090,
     SC_KEYMENU      = 0xF100,
     SC_ARRANGE      = 0xF110,
     SC_RESTORE      = 0xF120,
     SC_TASKLIST     = 0xF130,
     SC_SCREENSAVE   = 0xF140,
     SC_HOTKEY       = 0xF150,
//#if(WINVER >= 0x0400) //Win95
     SC_DEFAULT      = 0xF160,
     SC_MONITORPOWER = 0xF170,
     SC_CONTEXTHELP  = 0xF180,
     SC_SEPARATOR    = 0xF00F,
//#endif /* WINVER >= 0x0400 */

//#if(WINVER >= 0x0600) //Vista
     SCF_ISSECURE    = 0x00000001,
//#endif /* WINVER >= 0x0600 */

/*
  * Obsolete names
  */
     SC_ICON     = SC_MINIMIZE,
     SC_ZOOM     = SC_MAXIMIZE,
}

VB Definition:

Enum SysCommands
   TODO
End Enum

Notes:

The mysterious SCF_ISSECURE value does not appear in any official documentation.