//删除整个文件夹及其下的所有文件
function DelDirAll(aDir: string): Boolean;
var
vSearch: TSearchRec;
vRet: integer;
vKey: string;
begin

if aDir[Length(aDir)] <> '\' then
aDir := aDir + '\';
vKey := aDir + '*.*';
vRet := FindFirst(vKey, faanyfile, vSearch);
while vRet = 0 do
begin
if ((vSearch.Attr and fadirectory) = fadirectory) then
begin
if (vSearch.Name <> '.') and (vSearch.name <> '..') then
DelDirAll(aDir + vSearch.name);
end
else
begin
if ((vSearch.Attr and fadirectory) <> fadirectory) then
begin
{System.Sysutils.}DeleteFile(aDir + vSearch.name);
end;
end;
vRet := FindNext(vSearch);
end; //while

{System.SysUtils.}FindClose(vSearch);
Removedir(aDir); // 如果需要删除文件夹则添加
result := True;
end;

///////////////////

var
p: integer;
p1, p2: pchar;
IconIndex: word; // Position of the icon in the file
FileName: TFilename;
begin
IconIndex := 0;
FileName:='D:\yang\projects\罗为\福州日报外网发布工具\数据发布和备份工具\Win32\Debug\数据发布和备份工具.exe,1';
p1 := PChar(FileName);
p2 := StrRScan(p1, ','); //从字符串最左侧开始查找单个字符
if p2 <> nil then begin
p := p2 - p1 + 1; // Position of the comma
try
IconIndex := StrToInt(Copy(FileName, p + 1, Length(FileName) - p));
showmessage(inttostr(IconIndex));
except
on e:EConvertError do
begin
showmessage(e.Message);
end;
end;
SetLength(FileName, p - 1);
end;
end;