Q176552: HOWTO: Set Initial Default Size of ActiveX (ATL) Control

Article: Q176552
Product(s): Microsoft C Compiler
Version(s): 2.0,2.1,3.0,5.0,6.0
Operating System(s): 
Keyword(s): kbnokeyword kbActiveX kbATL200 kbATL210 kbCOMt kbCtrlCreate kbATL300 kbGrpDSMFCATL
Last Modified: 10-JUN-2002

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The information in this article applies to:

- The Microsoft Active Template Library (ATL), versions 2.0, 2.1, 3.0, used with:
   - Microsoft Visual C++, 32-bit Enterprise Edition, versions 5.0, 6.0 
   - Microsoft Visual C++, 32-bit Professional Edition, versions 5.0, 6.0 
   - Microsoft Visual C++, 32-bit Learning Edition, version 6.0 
   - Microsoft Visual C++.NET (2002) 
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SUMMARY
=======

This article shows how to set the default size of an Active Template Library
(ATL) control when it is first inserted into a container. The default width and
height of an ATL control is stored in a variable called m_sizeExtent, which is
normally initialized to 5080x5080 himetric units in the constructor for
CComControlBase from which CComControl is derived. You can set your own
preferred default size in your control's constructor, as follows:

     CTestControl()
     {
        // width = 100 pixels, height = 25 pixels
        SIZE sz = { 100, 25 };
        // convert pixels to himetric
        AtlPixelToHiMetric (&sz, &m_sizeExtent);
        // store natural extent
        m_sizeNatural = m_sizeExtent;
     }

(c) Microsoft Corporation 1997, All Rights Reserved. Contributions by Samsom
Tanrena, Microsoft Corporation

Additional query words: kbVC500 kbVC600 kbATL200 kbATL210 kbATL300 kbctrl

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Keywords          : kbnokeyword kbActiveX kbATL200 kbATL210 kbCOMt kbCtrlCreate kbATL300 kbGrpDSMFCATL 
Technology        : kbVCsearch kbAudDeveloper kbATLsearch
Version           : :2.0,2.1,3.0,5.0,6.0
Issue type        : kbhowto

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