如何调用其它控件的事件(20分)

我想自己写代码调用其它控件的事件，可是总是出错。
比如调用DBNavigator的onclick的事件。如下代码：
begin
...
DBNavigaotor.onclick;
...
end;
但是出错：Not enough actual parameters.
如何解决？

在有参数，关键承第二个表示按了哪个按钮：

DBNavigaotor.onclick(self,nbFirst);//到首记录

======================================
Button Value Action

First nbFirst Go to the first record
Prior nbPrior Go to the previous record
Next nbNext Go to the next record
Last nbLast Go to the last record
Insert nbInsert Insert a blank record
Delete nbDelete Delete the current record
Edit nbEdit Permit users to edit the current record
Post nbPost Post the current record
Cancel nbCancel Cancel the current edit
Refresh nbRefresh Refresh the data in the dataset

多人接受答案了。