.help imacck Sep86 imfort
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NAME
imacck -- determine if the named header keyword exists
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SYNOPSIS
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subroutine imacck (im, keyw, ier)

integer		im		#I image descriptor of open image
character*(*)	keyw		#I name of keyword to be accessed
integer		ier		#O status return
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DESCRIPTION
The \fIimacck\fR procedure is used to test if the named header keyword
can be accessed, i.e., if it exists.
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RETURN VALUE
A zero status return indicates that the header does indeed have such a
keyword.

IE_NEXKW:	nonexistent header keyword referenced
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SEE ALSO
imtypek, imaddk, imokwl
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