CONSTANT

VALUE DESCRIPTION

INSTALLSTATE_NOTUSED

-7

The component being requested is disabled on the computer.

INSTALLSTATE_SOURCEABSENT

-4

The component source is inaccessible.

INSTALLSTATE_INVALIDARG

-2

One of the function parameters is invalid.

INSTALLSTATE_UNKNOWN

-1

The product code or component identifier is unknown.

INSTALLSTATE_ABSENT

2

The component is not installed.

INSTALLSTATE_LOCAL

3

The component is installed locally.

INSTALLSTATE_SOURCE

4

The component is installed to run from source.