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3. Add a Command Button control to Form1. Command1 is created by
default. Set its Caption property to "Hide".
4. Add the following code to the Click event for Command1.
Private Sub Command1_Click()
hwnd1 = FindWindow("Shell_traywnd", "")
Call SetWindowPos(hwnd1, 0, 0, 0, 0, 0, SWP_HIDEWINDOW)
End Sub
5. Add a second Command Button control to Form1. Command2 is created by
default. Set its Caption property to "Show".
6. Add the following code to the Click event for Command2.
Private Sub Command2_Click()
Call SetWindowPos(hwnd1, 0, 0, 0, 0, 0, SWP_SHOWWINDOW)
End Sub
<p><font face="Verdana">Second, what do they do. Well, I might as well address
this issue as well as what they are at the same time. Pointers are what they
sound like...pointers. They point to locations in memory. Picture this: a big
jar that holds one thing, the name of another jar. In the other jar is the value
of an integer. The jars are memory locations. The jar that holds the name of the
other jar is a pointer. It points to the other drawer.</font></p>
<p><font face="Verdana"> How can you use this? Well,
look at this little piece of code:</font></p>
<p><font face="Verdana">#include <iostream.h></font></p>
<p><font face="Verdana">void main()</font></p>
<p><font face="Verdana">{<br>
int x;<br>
int *pointer;<br>
<br>
pointer=&x;<br>
cin>>x;<br>
cout<<*pointer;</font></p>
<p><font face="Verdana">}</font></p>
<p><font face="Verdana"> Guess what! The cout outputs
the value in x. Why is that? Well, look at the code. The integer is called x.
Then a pointer to an integer is defined as pointer. The astrick(*) symbol means
that it is a pointer. Then I give the memory location of x to pointer by using
the ampersand(&) symbol. It gives the memory location of the variable it is
in front of. For example, if the jar that had an integer had a ampersand in it
it would output its name, or location. Then the user inputs the value for
x. Then the cout uses the * to put the value stored in the memory location of
pointer. Huh? Picture the jars again. If the jar with the name of the other jar
in it had a * in front of it it would give the value stored in the jar with the
same name as the one in the jar with the name. It's not too hard, the * gives
the value in the location. The unastricked gives the memory location.</font></p>
<p><font face="Verdana"> I hope this has been at least
an interesting introduction to pointers. I do not suggest that you play around
with them too much as you can do unpleasant things on your computer, but you now
should have a better understand of what they are.</font></p>
<html>
<body>
<TABLE CELLSPACING=0>
<TR ID="hdr">
<TD CLASS="runninghead" nowrap>Visual Basic Language Reference</TD>
<TD CLASS="product" nowrap> </TD>
</TR>
</TABLE>
</div>
<div id="TitleRow">
<H1 class="dtH1"><A NAME="vastmimports"></A>Imports Statement</H1>
</div></div>
<DIV id="nstext" valign="bottom"><!---->
<P>Imports namespace names from referenced projects and assemblies. Also imports namespace names defined within the same project as the file in which the statement appears.</P>
<PRE class="syntax"><B>Imports</B> [ <I>aliasname = </I>] <I>namespace </I>[ <I>. element </I>]</PRE>
<H4 class="dtH4">Parts</H4>
<DL>
<DT><I>aliasname</I></DT>
<DD>Optional. The name by which <I>namespace</I> may also be known or referred to. When the <B>Imports</B> statement does not include <I>aliasname</I>, the elements defined within the specified <I>namespace</I> can be accessed within the file without qualification. When <I>aliasname</I> is specified, it must be used as a qualifier for the names contained in the namespace. Aliases are useful when you need to use items with the same name that are declared in one or more namespaces. </dd>
<DT><I>namespace</I></DT>
<DD>Required. The name of the namespace being imported. The namespace can be any number of nesting levels deep.</dd>
<DT><I>element</I></DT>
<DD>Optional. The name of an element declared in the namespace. The element can be an enumeration, structure, class, or module.</dd>
</DL>
<H4 class="dtH4">Remarks</H4>
<P>Each file can contain any number of <B>Imports</B> statements. <B>Imports</B> statements must be placed before any declarations, including <B>Module</B> or <B>Class</B> statements, and before any references to identifiers.</P>
<P>The scope of the elements made available by an <B>Imports</B> statement depends on how specific you are when using the <B>Imports</B> statement. For example, if only a namespace is specified, all uniquely named members of that namespace, and members of modules within that namespace, are available without qualification. If both a namespace and the name of an element of that namespace are specified, only the members of that element are available without qualification.</P>
<P>It is not permitted to define a member at module level with the same name as an import alias.</P>
<H4 class="dtH4">Example</H4>
<P>The following example imports the <B>Microsoft.VisualBasic.Strings</B> class and assigns an alias, <code class="ce">Str</code>, that can be used to access the <B>Left</B> method.</P>
<PRE class="code"><code><b class="cfe">Imports</b></code> Str = Microsoft.VisualBasic.Strings
' Place Imports statements at the top of your program
Class MyClass1
Sub ShowHello()
MsgBox(Str.Left("Hello World", 5)) ' Displays the word "Hello"
End Sub
End Class</PRE>
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