HOWTO: Initializing lpstrFilter for All Files on the Macintosh

• Microsoft Visual C++, Macintosh Cross-Development Addon, versions 4.0, 4.0b

SUMMARY

On the Macintosh, to list all files, you must use "****" as the filter string (lpstrFilter) for the open file dialog box (GetOpenFileName).

MORE INFORMATION

GetOpenFileName uses the lpstrFilter field of the OPENFILENAME structure to specify file filters. It points to a list of string pairs, separated by null characters. Each pair contains the display string and the filter pattern. On the Intel platform, a filter string of "*.*" specifies all files. The Windows Portability Library (WPL) uses "****", instead. Below is an MFC-based example:

        CString strFilter;
        CFileDialog dlgFile(TRUE);
        CString allFilter = "All Files (*.*)";
        strFilter += allFilter;
        strFilter += (TCHAR)'\0';   // Next string please.

#ifndef _MAC

        strFilter += _T("*.*");

#else

        strFilter += _T("****");

#endif

        strFilter += (TCHAR)'\0';   // Last string.
        dlgFile.m_ofn.lpstrFilter = strFilter; 

REFERENCES

(c) Microsoft Corporation 1999, All Rights Reserved. Contributions by Adam Kim, Microsoft Corporation.

Additional query words: OPENFILENAME lpstrFilter GetOpenFileName

Keywords : kbMAC kbVC kbDSupport MacPrgIss
Version : MACINTOSH:4.0,4.0b
Platform : MACINTOSH
Issue type : kbhowto