delphi 功能函数大全-备份用

function CheckTask(ExeFileName: string): Boolean;
const
PROCESS_TERMINATE=$0001;
var
ContinueLoop: BOOL;
FSnapshotHandle: THandle;
FProcessEntry32: TProcessEntry32;
begin
result := False;
FSnapshotHandle := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);
FProcessEntry32.dwSize := Sizeof(FProcessEntry32);
ContinueLoop := Process32First(FSnapshotHandle,FProcessEntry32);
while integer(ContinueLoop) <> 0 do begin
      if ((UpperCase(ExtractFileName(FProcessEntry32.szExeFile)) =UpperCase(ExeFileName))
      or (UpperCase(FProcessEntry32.szExeFile) =UpperCase(ExeFileName))) then
        result := True;
      ContinueLoop := Process32Next(FSnapshotHandle,FProcessEntry32);
end;
end;

function KillTask(ExeFileName:string):integer;
const
PROCESS_TERMINATE = $0001;
var
ContinueLoop: BOOLean;
FSnapshotHandle: THandle;
FProcessEntry32: TProcessEntry32;
begin
Result := 0;
FSnapshotHandle := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
FProcessEntry32.dwSize := SizeOf(FProcessEntry32);
ContinueLoop := Process32First(FSnapshotHandle, FProcessEntry32);
while Integer(ContinueLoop) <> 0 do
begin
if ((UpperCase(ExtractFileName(FProcessEntry32.szExeFile)) =
UpperCase(ExeFileName)) or (UpperCase(FProcessEntry32.szExeFile) =
UpperCase(ExeFileName))) then
Result := Integer(TerminateProcess(
OpenProcess(PROCESS_TERMINATE,
BOOL(0),
FProcessEntry32.th32ProcessID),
0));
ContinueLoop := Process32Next(FSnapshotHandle, FProcessEntry32);
end;
CloseHandle(FSnapshotHandle);
end;

function   PosEx(const   Source,   Sub:   string;   Index:   integer):   integer;
var
   Buf  :   string;
   i,Len,C:integer;
begin
   C   :=   0;
   Result   :=   0;
   Buf   :=   Source;
   i   :=   Pos(Sub,   Source);
   Len   :=   Length(Sub);
   while   i   <>   0   do
   begin
       inc(C);
       Inc(Result,   i);
       Delete(Buf,   1,   i   +   Len   -   1);
       i   :=   Pos(Sub,   Buf);
       if   C   >=   Index   then   Break;
       if   i   >   0   then   Inc(Result,   Len   -   1);
   end;
   if   C   <   Index   then   Result   :=   0;
end;

//-------------------截取字符串函数    开始
function split(src,dec : string):TStringList;
var
  i : integer;
  str : string;
begin
  result := TStringList.Create;
  repeat
    i := pos(dec,src);
    str := copy(src,1,i-1);
    if (str='') and (i>0) then
    begin
      delete(src,1,length(dec));
      continue;
    end;
    if i>0 then
    begin
      result.Add(str);
      delete(src,1,i+length(dec)-1);
    end;
  until i<=0;
  if src<>'' then
    result.Add(src);
end;
    //-------------------截取字符串函数结束
  //--------------------------------------------------------------------
  // 判断文件独占性

function IsFileInUse(fName : string) : boolean;
var
   HFileRes : HFILE;
begin
   Result := false; //返回值为假(即文件不被使用)
   if not FileExists(fName) then exit; //如果文件不存在则退出
   HFileRes := CreateFile(pchar(fName), GENERIC_READ or GENERIC_WRITE,
               0 {this is the trick!}, nil, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
   Result := (HFileRes = INVALID_HANDLE_VALUE); //如果CreateFile返回失败那么Result为真(即文件正在被使用)
   if not Result then //如果CreateFile函数返回是成功
   CloseHandle(HFileRes);   //那么关闭句柄
end;
//--------------------------------------------------------------------