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<?xml version="1.0" encoding="UTF-8"?>
<helpdocument version="1.0">
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<meta>
<topic id="textsbasicshared03090403xml" indexer="include" status="PUBLISH">
<title id="tit" xml-lang="en-US">Declare Statement</title>
<filename>/text/sbasic/shared/03090403.xhp</filename>
</topic>
</meta>
<body>
<section id="declare">
<bookmark xml-lang="en-US" branch="index" id="bm_id3148473">
<bookmark_value>Declare statement</bookmark_value>
</bookmark>
<paragraph id="hd_id3148473" role="heading" level="1" xml-lang="en-US"><link href="text/sbasic/shared/03090403.xhp" name="Declare Statement">Declare Statement</link></paragraph>
<bookmark xml-lang="en-US" branch="index" id="bm_id3145316">
<bookmark_value>DLL (Dynamic Link Library)</bookmark_value>
</bookmark>
<paragraph id="par_id3145316" role="paragraph" xml-lang="en-US">Declares and defines a subroutine in a DLL file that you want to execute from $[officename] Basic.</paragraph>
</section>
<paragraph id="par_id3146795" role="paragraph" xml-lang="en-US">See also: <link href="text/sbasic/shared/03090405.xhp" name="FreeLibrary">FreeLibrary</link></paragraph>
<paragraph id="hd_id3156344" role="heading" level="2" xml-lang="en-US">Syntax:</paragraph>
<bascode>
<paragraph id="par_id3148664" role="bascode" xml-lang="en-US">Declare {Sub | Function} Name Lib "Libname" [Alias "Aliasname"] [Parameter] [As Type]</paragraph>
</bascode>
<paragraph id="hd_id3153360" role="heading" level="2" xml-lang="en-US">Parameters:</paragraph>
<paragraph id="par_id3154140" role="paragraph" xml-lang="en-US"> <emph>Name:</emph> A different name than defined in the DLL, to call the subroutine from $[officename] Basic.</paragraph>
<paragraph id="par_id3150870" role="paragraph" xml-lang="en-US"> <emph>Aliasname</emph>: Name of the subroutine as defined in the DLL.</paragraph>
<paragraph id="par_id3154684" role="paragraph" xml-lang="en-US"> <emph>Libname:</emph> File or system name of the DLL. This library is automatically loaded the first time the function is used.</paragraph>
<paragraph id="par_id3148452" role="paragraph" xml-lang="en-US"> <emph>Argumentlist:</emph> List of parameters representing arguments that are passed to the procedure when it is called. The type and number of parameters is dependent on the executed procedure.</paragraph>
<paragraph id="par_id3147289" role="paragraph" xml-lang="en-US"> <emph>Type:</emph> Defines the data type of the value that is returned by a function procedure. You can exclude this parameter if a type-declaration character is entered after the name.</paragraph>
<paragraph id="par_id3146922" role="warning" xml-lang="en-US">To pass a parameter to a subroutine as a value instead of as a reference, the parameter must be indicated by the keyword <emph>ByVal</emph>.</paragraph>
<paragraph id="hd_id3153951" role="heading" level="2" xml-lang="en-US">Example:</paragraph>
<bascode>
<paragraph id="par_idm1340861616" role="bascode" localize="false" xml-lang="en-US">Declare Sub MyMessageBeep Lib "user32.dll" Alias "MessageBeep" ( Long )</paragraph>
<paragraph id="par_idm1340860336" role="bascode" localize="false" xml-lang="en-US">Sub ExampleDeclare</paragraph>
<paragraph id="par_idm1340859104" role="bascode" localize="false" xml-lang="en-US">Dim lValue As Long</paragraph>
<paragraph id="par_idm1340857872" role="bascode" localize="false" xml-lang="en-US"> lValue = 5000</paragraph>
<paragraph id="par_idm1340856640" role="bascode" localize="false" xml-lang="en-US"> MyMessageBeep( lValue )</paragraph>
<paragraph id="par_idm1340855392" role="bascode" localize="false" xml-lang="en-US"> FreeLibrary("user32.dll" )</paragraph>
<paragraph id="par_idm1340854144" role="bascode" localize="false" xml-lang="en-US">End Sub</paragraph>
</bascode>
</body>
</helpdocument>
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