DOCUMENT:Q191355 28-JUN-2001 [visualc] TITLE :FIX: ATL Doesn't Call InitCommonControls in ActiveX Control PRODUCT :Microsoft C Compiler PROD/VER:WINDOWS:2.0,2.1 OPER/SYS: KEYWORDS:kbwizard kbActiveX kbATL210 kbATL210bug kbCOMt kbCtrlCreate kbVC500bug kbVC600fix kbATL ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - The Microsoft Active Template Library (ATL), versions 2.0, 2.1, used with: - Microsoft Visual C++, 32-bit Enterprise Edition, version 5.0 - Microsoft Visual C++, 32-bit Professional Edition, version 5.0 ------------------------------------------------------------------------------- SYMPTOMS ======== An ATL ActiveX control based on one of the common controls may not appear in an ActiveX control container. CAUSE ===== The ATL Object Wizard doesn't add a call to InitCommonControls() when you insert an ActiveX control based on a common control. The call to InitCommonControls() is required if you use any of the common controls in your ATL ActiveX control. NOTE: If you didn't select "Support MFC" in the ATL Object Wizard when creating your project, then you must link with Comctl32.lib in order to call InitCommonControls(). Otherwise, an LNK2001 linker error may occur when calling InitCommonControls(). Among the common controls, the richedit control is an exception. Instead of calling InitCommonControls(), you need to do a LoadLibrary() on Riched32.dll. RESOLUTION ========== This problem has been fixed in Visual C++ 6.0. The ATL Object Wizard adds a call to InitCommonControls() for you. For richedit controls, you have to call LoadLibrary() and FreeLibrary() on Riched32.dll. If you're using Visual C++ 5.0 or earlier, just add the call to InitCommonControls() before calling Create() for the common control. The Wizard usually calls Create() in OnCreate(): LRESULT OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled) { RECT rc; GetWindowRect(&rc); rc.right -= rc.left; rc.bottom -= rc.top; rc.top = rc.left = 0; ::InitCommonControls(); // ADD THIS LINE m_ctlSysListView32.Create(m_hWnd, rc); return 0; } For the richedit control, you'll need to load Riched32.dll and unload it: BEGIN_MSG_MAP(CRichEdit6) MESSAGE_HANDLER(WM_DESTROY, OnDestroy) // Add this line. // ... END_MSG_MAP() HINSTANCE m_hLibRichEdit; // Add this line. LRESULT OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled) { RECT rc; GetWindowRect(&rc); rc.right -= rc.left; rc.bottom -= rc.top; rc.top = rc.left = 0; m_hLibRichEdit = LoadLibrary(_T("RICHED32.DLL")); // Add this line. m_ctlRichEdit.Create(m_hWnd, rc); return 0; } // Add this function. LRESULT OnDestroy(UINT, WPARAM, LPARAM, BOOL&) { m_ctlRichEdit.DestroyWindow(); FreeLibrary(m_hLibRichEdit); return 0; } STATUS ====== Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been corrected in Microsoft Visual C++, 6.0. MORE INFORMATION ================ Containers such as ActiveX Control Test Container in MFC 4.2 already call InitCommonControls() so this problem does not occur. Additional query words: ocx RichEdit SysListView32 SysTreeView32 SysAnimate32 SysTabControl32 rich edit listview treeview animate tab tabcontrol tooltip header hotkey image list progress slider spin buttton ====================================================================== Keywords : kbwizard kbActiveX kbATL210 kbATL210bug kbCOMt kbCtrlCreate kbVC500bug kbVC600fix kbATL300 kbATL300fix kbGrpDSMFCATL Technology : kbVCsearch kbAudDeveloper kbATLsearch Version : WINDOWS:2.0,2.1 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.