isvalid - Determine whether image acquisition object is associated with image acquisition device
Syntax
bool = isvalid(obj)
Description
bool = isvalid(obj) returns true if
the video input object obj is valid, otherwise false.
An object is an invalid image acquisition object if it is no longer
associated with any hardware; that is, the object was deleted using
the delete function. If this is the case, obj should
be cleared from the workspace.
If obj is an array of video input objects, bool is
a logical array where each element in bool represents
the corresponding element in obj. If an object
in obj is valid, the isvalid function
sets the corresponding element in bool to true,
otherwise false.
See Also
delete | imaqfind | videoinput
 | isrunning | | load |  |
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