c++builder防止程序重复运行 转贴

WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int)
{
 try
 {
   HANDLE hMutex=CreateMutex(NULL,false,"RunOnlyOneInstance");
   if(hMutex==NULL||ERROR_ALREADY_EXISTS==::GetLastError())
  {
   return false;
  }
  Application->Initialize();
  Application->Title = "";
  Application->CreateForm(__classid(TfmMain), &fmMain);
  Application->CreateForm(__classid(Tdm), &dm);
  Application->Run();
 }
 catch (Exception &exception)
 {
  Application->ShowException(&exception);
 }
 catch (...)
 {
  try
  {
   throw Exception("");
  }
  catch (Exception &exception)
  {
   Application->ShowException(&exception);
  }
 }
 return 0;
}