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Oncreate problem

Posted on 1998-05-21
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Last Modified: 2013-11-20
In the oncreate handler of my CMDIChild derived class I display a property sheet allowing the user to select options before the window is displayed. If the user selects cancel I exit the handler returning a -1. This prevents the window from being displayed but gives me the prompt. "Failed to create empty document". Is there any way to prevent this prompt. I am using the OpenDocumentFile (NULL) command to create the document view.
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Question by:BlackRussian
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galkin earned 80 total points
ID: 1313972
This message in generated as a result to failure in call inside CMultiDocTemplate::OpenDocumentFile to CreateNewFrame, which in turn calls CMDIChildFrame::Create. OpenDocumentFile function is virtual so you should override it to prevent this message box from being displayed.
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by:BlackRussian
ID: 1313973
I'm am using Visual C++ ver 4.0 , CMultiDocTemplate doesn't show up as a deriveable class using class wizard. Can you explain how or show a code snippent ?.
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LVL 7

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by:galkin
ID: 1313974
Yuo need manually derive class from CMultiDocTemplate and override virtual OpenDocumentFile function. also don't forget to change reference from  CMultiDocTemplate to your document template class inside CWinApp::InitInstance
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