1cdf0e10cSrcweir<?xml version="1.0" encoding="UTF-8"?>
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24*6dfc7de9Smseidel<helpdocument version="1.0">
25cdf0e10cSrcweir<meta>
26cdf0e10cSrcweir<topic id="textsbasicshared03102600xml" indexer="include">
27cdf0e10cSrcweir<title id="tit" xml-lang="en-US">IsNull Function [Runtime]</title>
28cdf0e10cSrcweir<filename>/text/sbasic/shared/03102600.xhp</filename>
29cdf0e10cSrcweir</topic>
30cdf0e10cSrcweir</meta>
31cdf0e10cSrcweir<body>
32cdf0e10cSrcweir<section id="isnull">
33cdf0e10cSrcweir<bookmark xml-lang="en-US" branch="index" id="bm_id3155555"><bookmark_value>IsNull function</bookmark_value>
34cdf0e10cSrcweir<bookmark_value>Null value</bookmark_value>
35cdf0e10cSrcweir</bookmark>
36cdf0e10cSrcweir<paragraph role="heading" id="hd_id3155555" xml-lang="en-US" level="1" l10n="U" oldref="1"><link href="text/sbasic/shared/03102600.xhp" name="IsNull Function [Runtime]">IsNull Function [Runtime]</link></paragraph>
37cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3146957" xml-lang="en-US" l10n="U" oldref="2">Tests if a Variant contains the special Null value, indicating that the variable does not contain data.</paragraph>
38cdf0e10cSrcweir</section>
39cdf0e10cSrcweir<paragraph role="heading" id="hd_id3150670" xml-lang="en-US" level="2" l10n="U" oldref="3">Syntax:</paragraph>
40cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3150984" xml-lang="en-US" l10n="U" oldref="4">IsNull (Var)</paragraph>
41cdf0e10cSrcweir<paragraph role="heading" id="hd_id3149514" xml-lang="en-US" level="2" l10n="U" oldref="5">Return value:</paragraph>
42cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3145609" xml-lang="en-US" l10n="U" oldref="6">Bool</paragraph>
43cdf0e10cSrcweir<paragraph role="heading" id="hd_id3149669" xml-lang="en-US" level="2" l10n="U" oldref="7">Parameters:</paragraph>
44cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3159414" xml-lang="en-US" l10n="U" oldref="8">
45cdf0e10cSrcweir<emph>Var:</emph> Any variable that you want to test. This function returns True if the Variant contains the Null value, or False if the Variant does not contain the Null value.</paragraph>
46cdf0e10cSrcweir<paragraph role="paragraph" id="par_idN1062A" xml-lang="en-US" l10n="NEW">
47cdf0e10cSrcweir<emph>Null</emph> - This value is used for a variant data sub type without valid contents.</paragraph>
48cdf0e10cSrcweir<embed href="text/sbasic/shared/00000003.xhp#errorcode"/>
49cdf0e10cSrcweir<embed href="text/sbasic/shared/00000003.xhp#err5"/>
50cdf0e10cSrcweir<paragraph role="heading" id="hd_id3153381" xml-lang="en-US" level="2" l10n="U" oldref="9">Example:</paragraph>
51cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3154140" xml-lang="en-US" l10n="U" oldref="10">Sub ExampleIsNull</paragraph>
52cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3145172" xml-lang="en-US" l10n="U" oldref="11">Dim vVar As Variant</paragraph>
53cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3144760" xml-lang="en-US" l10n="U" oldref="12">msgbox IsNull(vVar)</paragraph>
54cdf0e10cSrcweir<paragraph role="paragraph" id="par_id3153970" xml-lang="en-US" l10n="U" oldref="13">end sub</paragraph>
55cdf0e10cSrcweir</body>
56cdf0e10cSrcweir</helpdocument>
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