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Extensible Markup Language  |  2002-01-24  |  3.9 KB  |  55 lines
  1. <?xml version="1.0" encoding="utf-8"?>
  2. <html><head><title>Declare Statement [Runtime]</title><meta name="filename" content="text/sbasic/common/03090403"/><meta name="language" content="en-US"/><help:css-file-link xmlns:help="http://openoffice.org/2000/help"/><!--The CSS style header method for setting styles--><style type="text/css">
  3.  
  4.         table.Tabelle1{
  5.                 }
  6.         span.Tabelle1A{
  7.                 width:1.499cm;}
  8.         span.Tabelle1B{
  9.                 width:16.498cm;}
  10.         tr.Tabelle11{
  11.                 }
  12.         td.Tabelle1A1{
  13.                 }
  14.         p.P1{
  15.                 }
  16.         p.P2{
  17.                 }
  18.         span.T1{
  19.                 font-weight:bold;}
  20.         span.fr1{
  21.                 }
  22.         </style></head><body>
  23.   
  24.   
  25.   <help:to-be-embedded Eid="declare" xmlns:help="http://openoffice.org/2000/help"><a name="declare"/>
  26.   <p class="Head1"><help:link Id="66561">Declare Statement [Runtime]</help:link></p>
  27.   <p class="Paragraph">Used to declare and define a subroutine in a <help:key-word value="DLL (Dynamic Link Library)" tag="kw66561_2"/>DLL (Dynamic Link Library) to be executed from <help:productname>%PRODUCTNAME</help:productname> Basic.</p>
  28.   </help:to-be-embedded>
  29.   <p class="Paragraph">See also: <help:link Id="66404" Eid="freelibrary" xmlns:help="http://openoffice.org/2000/help">FreeLibrary</help:link></p>
  30.   <p class="Paragraph"><span class="T1">Syntax</span>:</p>
  31.   <p class="Paragraph">Declare {Sub | Function} Name Lib "Libname" [Alias "Aliasname"] [Parameter] [As Typ] <help:key-word value="Declare" tag="kw66561_1" xmlns:help="http://openoffice.org/2000/help"/></p>
  32.   <p class="Paragraph"><span class="T1">Parameter</span>:</p>
  33.   <p class="P2">Parameter/Element</p>
  34.   <p class="Paragraph">Name: A different name than defined in the DLL, used to call the subroutine from Basic.</p>
  35.   <p class="Paragraph">Aliasname: Name of the subroutine as defined in the DLL.</p>
  36.   <p class="Paragraph">Libname: File or system name of the DLL. This library is automatically loaded the first time the function is used.</p>
  37.   <p class="Paragraph">Argumentlist: 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.</p>
  38.   <p class="Paragraph">Type: Defines the data type of the value returned by a Function procedure. This can be excluded if a type-declaration character is entered after the name.</p>
  39.   <table><tr class="Tabelle11"><th class="Tabelle1A1" style="text-align:left;"><span class="Tabelle1A">
  40.       <p class="TextInTable"><draw:image draw:style-name="fr1" draw:name="HIND_1" text:anchor-type="paragraph" svg:width="0.847cm" svg:height="0.847cm" draw:z-index="0" xlink:href="65640" xlink:type="simple" xlink:show="embed" xlink:actuate="onLoad" draw:filter-name="GIF - Graphics Interchange" xmlns:draw="http://openoffice.org/2000/drawing" xmlns:text="http://openoffice.org/2000/text" xmlns:svg="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"/></p>
  41.      </span></th><th class="Tabelle1A1" style="text-align:left;"><span class="Tabelle1B">
  42.       <p class="TextInTable">Parameters must be indicated by the keyword <span class="T1">ByVal</span> if they are to be passed to the subroutine as a value instead of as a <text:s text:c="" xmlns:text="http://openoffice.org/2000/text"/>reference.</p>
  43.      </span></th></tr></table>
  44.   <p class="Paragraph"/>
  45.   <p class="P2">Example:</p>
  46.   <p class="PropText">Declare Sub MyMessageBeep Lib "user32.dll" Alias "MessageBeep" ( long )</p>
  47.   <p class="PropText"/>
  48.   <p class="PropText">Sub ExampleDeclare</p>
  49.   <p class="PropText"><text:tab-stop xmlns:text="http://openoffice.org/2000/text"/>Dim lValue As Long</p>
  50.   <p class="PropText"><text:tab-stop xmlns:text="http://openoffice.org/2000/text"/>lValue = 5000</p>
  51.   <p class="PropText"><text:tab-stop xmlns:text="http://openoffice.org/2000/text"/>MyMessageBeep( lValue )</p>
  52.   <p class="PropText"><text:tab-stop xmlns:text="http://openoffice.org/2000/text"/>FreeLibrary("user32.dll" )</p>
  53.   <p class="PropText">End Sub</p>
  54.   <p class="PropText"/>
  55.  </body></html>