請問一下，我用Thread Object建立一個thread物件，將欲執行的程序放在thread的Execute()函式中，其中有寫到Edit1->SetFocus()，但卻沒有運作？其它部份都沒有問題，在之前Edit1->Enabled是false的，但我在寫SetFocus之前，有把它解開，也就是說如下的程式碼：

Thread::Execute()
{
   ...
   Edit1->Enabled = true;
   ...
   Edit1->SetFocus();
   ...
}

不知道是什麼原因，SetFocus沒有作用？感激...

hornacek你好： VCL不是Thread safe，所以在Execute裡面不能直接執行有用到VCL的程式。作法是把那些程式碼包成一個函式，並且利用Synchronize()呼叫他們。 Executes a method call within the main VCL thread. typedef void __fastcall (__closure *TThreadMethod)(void); void __fastcall Synchronize(TThreadMethod &Method); Description Synchronize causes the call specified by Method to be executed using the main VCL thread, thereby avoiding multi-thread conflicts. If you are unsure whether a method call is thread-safe, call it from within the Synchronize method to ensure that it executes in the main VCL thread. Execution of the thread current is suspended while Method executes in the main VCL thread. Warning: Do not call Synchronize from within the main VCL thread. Doing so leads to an infinite loop. Note: You can also protect unsafe methods using critical sections or the multi-read exclusive-write synchronizer.