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:

In WM_SYSCOMMAND messages, the four low-order bits of the wParam parameter are used internally by the system. To obtain the correct result when testing the value of wParam, an application must combine the value 0xFFF0 with the wParam value by using the bitwise AND operator.

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