</ iframe > </noscript> <!-- End Google Tag Manager (noscript) --> <div id="BeforeHeaderContent"> </div> <div id="HeaderContent"> <div id="ProjectTitle">CalendarView for WinForms</div> <div id="PageTitle"><div id="PageTitleText">PreValidating Event</div></div> </div> <div id="AfterHeaderContent"> <!-- Spacing --> <span id="ToggleAllSectionsLink" class="FunctionLink"> <label id="CollapseAllLabel">Collapse All</label> <label id="ExpandAllLabel" style="display: none;">Expand All</label> </span><!-- Spacing --> <span id="LanguageFilterPopupLink" class="PopupLink" data-popupcontentsource="#LanguageCheckboxes" data-popuptitle='Language Filter'> <label id="ShowAllLabel" for="LanguageFilterPopupLink"> Language Filter: All </label> <label id="MultipleLabel" for="LanguageFilterPopupLink" style="display: none;"> Language Filter: Multiple </label> <label id="VBAllLabel" for="LanguageFilterPopupLink" style="display: none;"> Language Filter: Visual Basic </label> <label id="VBLabel" for="LanguageFilterPopupLink" style="display: none;">Language Filter: Visual Basic (Declaration)</label> <label id="VBUsageLabel" for="LanguageFilterPopupLink" style="display: none;">Language Filter: Visual Basic (Usage)</label> <label id="CSLabel" for="LanguageFilterPopupLink" style="display: none;">Language Filter: C#</label> <label id="CPP2005Label" for="LanguageFilterPopupLink" style="display: none;">Language Filter: C++/CLI</label> </span> <div class="PopupContent" id="LanguageCheckboxes"> <input data-languagename="VB" id="VBLanguageCheckbox" type="checkbox" class="ToggleLanguageCheckbox" checked="true" data-toggleclass="FilteredContentVB"> <label class="LanguageFilter" for="VBCheckbox"> Visual Basic (Declaration) </label> <br><input data-languagename="VBUsage" id="VBUsageLanguageCheckbox" type="checkbox" class="ToggleLanguageCheckbox" checked="true" data-toggleclass="FilteredContentVBUsage"> <label class="LanguageFilter" for="VBUsageCheckbox"> Visual Basic (Usage) </label> <br><input data-languagename="CS" id="CSLanguageCheckbox" type="checkbox" class="ToggleLanguageCheckbox" checked="true" data-toggleclass="FilteredContentCS"> <label class="LanguageFilter" for="CSCheckbox"> C# </label> <br><input data-languagename="CPP2005" id="CPP2005LanguageCheckbox" type="checkbox" class="ToggleLanguageCheckbox" checked="true" data-toggleclass="FilteredContentCPP2005"> <label class="LanguageFilter" for="CPP2005Checkbox"> C++/CLI </label> </div> </div> <div class="BreadcrumbsContainer"><table><tr><td> <a href="C1.Win.C1Input.4~C1.Win.C1Input_namespace.html">C1.Win.C1Input Namespace</a> > <a href="C1.Win.C1Input.4~C1.Win.C1Input.C1TextBox.html">C1TextBox Class</a> : PreValidating Event</td></tr></table></div> <div id="BodyContent"> <div class="DescriptionContent">Programmatic input string validation.</div> <div class="SectionHeading" id="syntaxSectionHeading"><span class="SectionHeadingIcon"><!-- --></span><span class="SectionHeadingText">Syntax</span></div><div id="syntaxSectionContent" class="SectionContent"> <div class="TabContainer" id="TabContainer"> <ul> <li class="FilteredContentVBAll"><a href="#Syntax-VBAll">Visual Basic</a></li> <li class="FilteredContentCS"><a href="#Syntax-CS">C#</a></li> <li class="FilteredContentCPP2005"><a href="#Syntax-CPP2005">C++/CLI</a></li> </ul> <div id="Syntax-VB" class="FilteredContentVB"> <pre><pre><span style="color: #008000; ">'Declaration </span> </pre><pre><C1DescriptionAttribute(<span style="color: #800000; ">"Programmatic input string validation."</span>)> <C1CategoryAttribute(<span style="color: #800000; ">"Data"</span>)> <span style="color: #0000FF; ">Public</span> <span style="color: #0000FF; ">Event</span> PreValidating <span style="color: #0000FF; ">As</span> PreValidationEventHandler</pre></pre> </div> <div id="Syntax-VBUsage" class="FilteredContentVBUsage"> <pre><pre><span style="color: #008000; ">'Usage </span> </pre><pre><span style="color: #0000FF; ">Dim</span> instance <span style="color: #0000FF; ">As</span> <a href="C1.Win.C1Input.4~C1.Win.C1Input.C1TextBox.html">C1TextBox</a> <span style="color: #0000FF; ">Dim</span> handler <span style="color: #0000FF; ">As</span> PreValidationEventHandler <span style="color: #0000FF; ">AddHandler</span> instance.PreValidating, handler</pre></pre> </div> <div id="Syntax-CS" class="FilteredContentCS"> <pre><pre>[C1Description(<span style="color: #800000; ">"Programmatic input string validation."</span>)] [C1Category(<span style="color: #800000; ">"Data"</span>)] <span style="color: #0000FF; ">public</span> <span style="color: #0000FF; ">event</span> PreValidationEventHandler PreValidating</pre></pre> </div> <div id="Syntax-CPP2005" class="FilteredContentCPP2005"> <pre><pre>[C1Description(<span style="color: #800000; ">"Programmatic input string validation."</span>)] [C1Category(<span style="color: #800000; ">"Data"</span>)] <span style="color: #0000FF; ">public</span>: <span style="color: #0000FF; ">event</span> PreValidationEventHandler^ PreValidating</pre></pre> </div> </div> </div> </div> <a name="exampleBookmark"></a> <div class="SectionHeading" id="requirementsSectionHeading"><span class="SectionHeadingIcon"><!-- --></span><span class="SectionHeadingText">Requirements</span></div><div id="requirementsSectionContent" class="SectionContent"><p><b>Target Platforms:</b> Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2</p></div> <a name="seealsobookmark"></a> <div class="SectionHeading" id="seealsoSectionHeading"><span class="SectionHeadingIcon"><!-- --></span><span class="SectionHeadingText">See Also</span></div><div id="seealsoSectionContent" class="SectionContent"><h4 class="subHeading">Reference</h4><p><a href="C1.Win.C1Input.4~C1.Win.C1Input.C1TextBox.html">C1TextBox Class</a> <br><a href="C1.Win.C1Input.4~C1.Win.C1Input.C1TextBox_members.html">C1TextBox Members</a> </p> </div> <div id="FooterContent"> <a href="mailto:support@company.com?subject=Documentation Feedback: C1.Win.C1Input.4~C1.Win.C1Input.C1TextBox~PreValidating_EV.html">Send Feedback</a> </div> </body> </html>