CFileDialog 打开文件下拉列表类型问题

[zhp21]

象 media play 那样除了一班类型， all file 以外还有个 所有媒体文件是怎样做的？
点所有媒体文件，显示图标就过滤掉：非列出来的文件

[laolaoliu2002]

http://www.codeproject.com/dialog/fndsoundpreview.asp
CSoundFileDlg - An Open/Save dilaog for sound files with Preview (or prelisten)

[neosu]

filter串为
"所有媒体文件|*.avi,*.mpg.........."
这个串可以动态生成

[laolaoliu2002]

explicit CFileDialog(
BOOL bOpenFileDialog,
LPCTSTR lpszDefExt = NULL,
LPCTSTR lpszFileName = NULL,
DWORD dwFlags = OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,
LPCTSTR lpszFilter = NULL,
CWnd* pParentWnd = NULL,
DWORD dwSize = 0
);
static char BASED_CODE szFilter[] = "Chart Files (*.xlc)|*.xlc|Worksheet Files (*.xls)|*.xls|Data Files (*.xlc;*.xls)|*.xlc; *.xls|All Files (*.*)|*.*||";

lpszFilter = szFilter;

[laolaoliu2002]

// szFilters is a text string that includes two file name filters:
// "*.my" for "MyType Files" and "*.*' for "All Files."
char CChildFrame::szFilters[]=
"MyType Files (*.my)|*.my|All Files (*.*)|*.*||";

// Create an Open dialog; the default file name extension is ".my".
CFileDialog fileDlg (TRUE, "my", "*.my",
OFN_FILEMUSTEXIST| OFN_HIDEREADONLY, szFilters, this);

// Display the file dialog. When user clicks OK, fileDlg.DoModal()
// returns IDOK.
if( fileDlg.DoModal ()==IDOK )
{
CString pathName = fileDlg.GetPathName();

// Implement opening and reading file in here.
...
//Change the window's title to the opened file's title.
CString fileName = fileDlg.GetFileTitle ();

SetWindowText(fileName);
}

[hslinux]

char filter[] ="Support Files(*.txt)|*.txt||";
CFileDialog dlg(TRUE,NULL,NULL,OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT|OFN_NOCHANGEDIR|OFN_ALLOWMULTISELECT,filter);
dlg.DoModal();