引言: 小弟這有個問題想請教大家一下..... 我在程式中使用了drivebox這個物件.... 當我放入隨身碟後它並找不到, 必需重新執行程式才能找到 這是什麼原因呢?? 有辦法解決嗎?? 無

uhlin你好： 當然當然，元件本身並沒有 class="code">In .h #include //remember to include this file //--------------------------------------------------------------------------- class TForm1 : public TForm { __published: // IDE-managed Components TMemo *Memo1; void __fastcall FormCreate(TObject *Sender); private: // User declarations TWndMethod OldFormWndProc; void __fastcall FormWndProc(TMessage& Message); public: // User declarations __fastcall TForm1(TComponent* Owner); }; In .cpp ~~ #include remember to include this file ~~ TForm1 *Form1; TDriveComboBox* dcb; //--------------------------------------------------------------------------- __fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner) { OldFormWndProc=this->WindowProc; this->WindowProc=FormWndProc; } //--------------------------------------------------------------------------- void __fastcall TForm1::FormCreate(TObject *Sender) { dcb=new TDriveComboBox(this); dcb->Parent=this; } //--------------------------------------------------------------------------- void __fastcall TForm1::FormWndProc(TMessage& Message) { OldFormWndProc(Message); if (Message.Msg==WM_DEVICECHANGE) { if (Message.WParam==DBT_DEVICEARRIVAL) { Memo1->Lines->Add("新插入了一項裝置!"); //發現有新插的裝置，則重新new一個TDriveComboBox元件，以達成updata dcb->Enabled=false; delete dcb; dcb=new TDriveComboBox(this); dcb->Parent=this; } if (Message.WParam==DBT_DEVICEREMOVECOMPLETE) { Memo1->Lines->Add("卸除了一項裝置!"); //發現有新拔的裝置，則重新new一個TDriveComboBox元件，以達成updata dcb->Enabled=false; delete dcb; dcb=new TDriveComboBox(this); dcb->Parent=this; } } } 針對updata的手法應該是要改一下比較好，目前我一下子沒有正解，uhlin可能要自已先研究一下了!

    DriveComboBox1->TextCase = tcLowerCase;// UpperCase can also work