C# Definition:

public enum INSTALLSTATE
{
    INSTALLSTATE_NOTUSED      = -7,  // component disabled
    INSTALLSTATE_BADCONFIG    = -6,  // configuration data corrupt
    INSTALLSTATE_INCOMPLETE   = -5,  // installation suspended or in progress
    INSTALLSTATE_SOURCEABSENT = -4,  // run from source, source is unavailable
    INSTALLSTATE_MOREDATA     = -3,  // return buffer overflow
    INSTALLSTATE_INVALIDARG   = -2,  // invalid function argument
    INSTALLSTATE_UNKNOWN      = -1,  // unrecognized product or feature
    INSTALLSTATE_BROKEN       =  0,  // broken
    INSTALLSTATE_ADVERTISED   =  1,  // advertised feature
    INSTALLSTATE_REMOVED      =  1,  // component being removed (action state, not settable)
    INSTALLSTATE_ABSENT       =  2,  // uninstalled (or action state absent but clients remain)
    INSTALLSTATE_LOCAL    =  3,  // installed on local drive
    INSTALLSTATE_SOURCE       =  4,  // run from source, CD or net
    INSTALLSTATE_DEFAULT      =  5,  // use default, local or source
}

VB Definition:

Public Enum INSTALLSTATE
   TODO
End Enum

Notes:

None.