初学者遇到的小问题，请执教

[conte]

刚开始symbian ,用carbide c++ 和 s60 2nd fp3，helloworld示例程序，

想在container中增加一个编辑框，代码如下：

RSS:

RESOURCE EDWIN r_plaintexteditor_test{
width =20;
lines = 1;
maxlength = 64;
flags=EEikEdwinWidthInPixels;
avkon_flags=EAknEditorFlagNoT9;
default_case=EAknEditorLowerCase;
allowed_case_modes=EAknEditorLowerCase|EAknEditorUpperCase;
numeric_keymap=EAknEditorPlainNumberModeKeymap;
allowed_input_modes=EAknEditorTextInputMode;
default_input_mode=EAknEditorTextInputMode;
}

container类中：

void ChelloContainer::ConstructL(const TRect& aRect)
{
CreateWindowL();

iLabel = new (ELeave) CEikLabel;
iLabel->SetContainerWindowL( *this );
iLabel->SetTextL( _L("Example View") );

iToDoLabel = new (ELeave) CEikLabel;
iToDoLabel->SetContainerWindowL( *this );
iToDoLabel->SetTextL( _L("Add Your controls\n here") );


ieditor=new (ELeave) CEikEdwin;
ieditor->SetContainerWindowL(*this);

TResourceReader reader;
iCoeEnv->CreateResourceReaderLC(reader,R_PLAINTEXTEDITOR_TEST);
ieditor->ConstructFromResourceL(reader);
CleanupStack::PopAndDestroy();


ieditor->SetFocus(ETrue);

SetRect(aRect);
ActivateL();
}


void ChelloContainer::SizeChanged()
{
// TODO: Add here control resize code etc.
iLabel->SetExtent( TPoint(10,10), iLabel->MinimumSize() );
iToDoLabel->SetExtent( TPoint(10,100), iToDoLabel->MinimumSize() );
ieditor->SetExtent( TPoint(10,40), ieditor->MinimumSize() );
}

红色部分代码是我加的，运行正常但是没显示编辑框，这个问题应该很简单，见笑了
请指教，不胜感激

[Atoric]

检查：
CountComponentControls()
ComponentControl(TInt index)

[knowledge_Is_Life]

这个简单啊,网上搜一下就得到答案了.