</ iframe > </noscript> <!-- End Google Tag Manager (noscript) --> <div id="BeforeHeaderContent"> </div> <div id="HeaderContent"> <div id="ProjectTitle">Bitmap for WinForms</div> <div id="PageTitle"><div id="PageTitleText">QueryInterface Method (IUnknown)</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="CSLabel" for="LanguageFilterPopupLink" style="display: none;">Language Filter: C#</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="CS" id="CSLanguageCheckbox" type="checkbox" class="ToggleLanguageCheckbox" checked="true" data-toggleclass="FilteredContentCS"> <label class="LanguageFilter" for="CSCheckbox"> C# </label> </div> </div> <div class="BreadcrumbsContainer"><table><tr><td> <a href="C1.Win.C1DX.4.html">C1.Win.C1DX.4 Assembly</a> > <a href="C1.Win.C1DX.4~C1.Util.DX_namespace.html">C1.Util.DX Namespace</a> > <a href="C1.Win.C1DX.4~C1.Util.DX.IUnknown.html">IUnknown Interface</a> : QueryInterface Method</td></tr></table></div> <div id="guidPopupContent" class="PopupContent"> The guid of the interface. </div> <div id="comObjectPopupContent" class="PopupContent"> The output COM object reference. </div> <div id="BodyContent"> <div class="DescriptionContent">Queries the supported COM interface on this instance.</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> </ul> <div id="Syntax-VB" class="FilteredContentVB"> <pre>'Declaration Function QueryInterface( _ ByRef <i><a class="PopupLink" id="guidPopupLink" data-popupcontentsource="#guidPopupContent" data-popupshowevent="click mouseenter">guid</a></i> As System.Guid, _ ByRef <i><a class="PopupLink" id="comObjectPopupLink" data-popupcontentsource="#comObjectPopupContent" data-popupshowevent="click mouseenter">comObject</a></i> As System.IntPtr _ ) As <a href="C1.Win.C1DX.4~C1.Util.DX.HResult.html">HResult</a></pre> </div> <div id="Syntax-CS" class="FilteredContentCS"> <pre><a href="C1.Win.C1DX.4~C1.Util.DX.HResult.html">HResult</a> QueryInterface( ref System.Guid <i><a class="PopupLink" id="guidPopupLink" data-popupcontentsource="#guidPopupContent" data-popupshowevent="click mouseenter">guid</a></i>, out System.IntPtr <i><a class="PopupLink" id="comObjectPopupLink" data-popupcontentsource="#comObjectPopupContent" data-popupshowevent="click mouseenter">comObject</a></i> )</pre> </div> </div> <h4 class="dxh4">Parameters</h4><dl><dt><i>guid</i></dt> <dd>The guid of the interface.</dd><dt><i>comObject</i></dt> <dd>The output COM object reference.</dd></dl> <h4 class="dxh4">Return Value</h4><div class="ReturnsContent">If successfull, <a href="C1.Win.C1DX.4~C1.Util.DX.HResult~Ok.html">HResult.Ok</a></div></div> <a name="exampleBookmark"></a> <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.C1DX.4~C1.Util.DX.IUnknown.html">IUnknown Interface</a> <br><a href="C1.Win.C1DX.4~C1.Util.DX.IUnknown_members.html">IUnknown Members</a> </p> </div> </div> <div id="FooterContent"> </div> </body> </html>