Call this member function to add a document template to the list of available document templates that the application maintains.
void AddDocTemplate( 
   CDocTemplate* pTemplate  
);
Parameters
- pTemplate
A pointer to the CDocTemplate to be added. 
Remarks
You should add all document templates to an application before you call RegisterShellFileTypes.
Example
// The following code is produced by the Application Wizard when you 
   // choose the MDI (multiple document interface) option.
    CMultiDocTemplate* pDocTemplate;
    pDocTemplate = new CMultiDocTemplate(IDR_MYTYPE,
        RUNTIME_CLASS(CMyDoc),
        RUNTIME_CLASS(CChildFrame), // custom MDI child frame
        RUNTIME_CLASS(CMyView));
    if (!pDocTemplate)
        return FALSE;
    AddDocTemplate(pDocTemplate);
Requirements
Header: afxwin.h