解决自动更新因为EXE文件正在运行而失败的问题

function IsFileInUse(FName:string):Boolean;
var
HFileRes:HFILE;
begin
Result:=False;
if not FileExists(FName) then
Exit;
HFileRes:=CreateFile(PChar(FName),GENERIC_READ or GENERIC_WRITE,0,
nil,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
Result:=(HFileRes=INVALID_HANDLE_VALUE);
if not Result then
CloseHandle(HFileRes);
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;

procedure CloseMainProcess(fileName: string);
begin
if (ExtractFileExt(fileName)='.exe') or
(ExtractFileExt(fileName)='.com') then
begin
if IsFileInUse(fileName) then
begin
KillTask(fileName);
end;
end;
end;