delphi 删除指定文件夹下所有文件

function TForm1.DeleteDirectory(NowPath: string): Boolean; // 删除整个目录

var
search: TSearchRec;
ret: integer;
key: string;
begin
if NowPath[Length(NowPath)] <> '\' then
NowPath := NowPath + '\';
key := NowPath + '*.*';
ret := findFirst(key, faanyfile, search);
while ret = 0 do
begin
if ((search.Attr and fadirectory) = fadirectory) then
begin
if (search.Name <> '.') and (search.name <> '..') then
DeleteDirectory(NowPath + search.name);
end
else
begin
if ((search.Attr and fadirectory) <> fadirectory) then
begin
deletefile(NowPath + search.name);
end;
end;
ret := FindNext(search);
end;
findClose(search);
//removedir(NowPath); 如果需要删除文件夹则添加
result := True;
end;