要删除temp目录下所有扩展名为.txt的文件这样写:
fname1:='command.com /c del '+'ExtractFilePath(Application.ExeName)+'temp/*.txt';
fname2:='cmd.exe /c del '+'ExtractFilePath(Application.ExeName)+'temp/*.txt';
if WinExec(Pchar(fname1),sw_hide)<31 then
//在Win9X下
WinExec(Pchar(fname2),sw_hide);
//在Win2K或WinXp下