版主大人及前輩大大：
想詢問一下Notification機制要參考哪些機制，因為我自訂元件內有自訂DataSource，但是
我發現若是我有將自己寫的元件設定DataSource，我卻無法在表單上移除或移除時會出現警告訊息
，但是我一將這個元件的DataSource清空，卻可以正常移除，不知道我問題發生在哪裡！

procedure YaoFRM.Notification(AComponent: TComponent; Operation: TOperation);
begin
inherited Notification(AComponent, Operation);
if (Operation = opRemove) then
begin
// if (DataSource <> nil) and (AComponent = DataSource) then
if (AComponent = DataSource) then
DataSource := nil;
end;
end;

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「人們所以覺得寂寞，是因為他們會築牆，卻不會搭橋。」
程式寫的越久，卻發現自己越來越不會寫程式！

 我找了一下help資料
Notification method (IDesignerNotify) IDesignerNotify
TOperation represents the types of operations whose occurrence is broadcast by the Notification method.
Unit
Classes
Delphi syntax:
type TOperation = (opInsert, opRemove);
Description
The TOperation type is used in the Notification method to indicate whether the notification
indicates the creation or deletion of an object. The following table gives the possible values:
Value Meaning
opInsert The specified object has just been created.
opRemove The specified object has been destroyed, and its memory is about to be freed.

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「人們所以覺得寂寞，是因為他們會築牆，卻不會搭橋。」
程式寫的越久，卻發現自己越來越不會寫程式！