cfiledialog filedlg(true);
filedlg.m_ofn.lpstrfilter="doc file(*.doc)/0*.doc；*.docx/0all files(*.*)/0*.*/0
/0";
filedlg.domodal();
這三行**就構建了乙個「開啟」檔案對話方塊；
特別需要關注的是檔案的過濾：
msdn如是說：
1、m_ofnis a structure of typeopenfilename；
2、openfilename結構體中有乙個成員項lpstrfilter：
pointer to a buffer containing pairs of null-terminated filter strings.
the last stringin the buffer must be terminated bytwo null characters.
the first stringin each pair is adisplay stringthat describes the filter (for example, "text files"), and the second string specifiesthe filter pattern(for example, "*.txt").
to specify multiple filter patterns for a single display string, use a semicolon to separate the patterns (for example, "*.txt;*.doc;*.bak").
iflpstrfilteris null, the dialog box does not display any filters.
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