组合框的列表框不可见

问题描述

大家好！

希望对您有所帮助:)！

请考虑以下代码(我认为这足以理解我的问题，但我最终可以添加其他代码行):

Hi everybody!

I hope in your help:)!

Please, consider following code (I think it''s adequate for understanding my problem but I can eventually add other lines of code):

void CDialog::DoDataExchange(CDataExchange* pDX)
{
 CDialog::DoDataExchange(pDX);

  DDX_Control(pDX, IDC_COMBO, m_Combo);
  DDX_CBIndex(pDX, IDC_COMBO, m_ComboValue);
}

BOOL CDialog::OnInitDialog()
{
 CDialog::OnInitDialog();

 m_Combo.ShowWindow(SW_SHOW);

 FromMMToDlg();

 return TRUE;
}

void CDialog::FromMMToDlg()
{
 m_Combo.AddString("aaaa");
 m_Combo.AddString("bbbb");

 OnSelchangeCombo();
}

BEGIN_MESSAGE_MAP(CDialog, CDialog)
  ON_CBN_SELCHANGE(IDC_COMBO, OnSelchangeCombo)
END_MESSAGE_MAP()

void CDialog::OnSelchangeCombo()
{
 UpdateData(TRUE);

 switch(m_ComboValue)
 {
 case 0:
  // Part A
  break;
 case 1:
  // Part B
  break;
 }
}

组合框的类型"是拖放列表"，组合框的所有者画图"是否".
为什么我无法使组合框的列表框可见?

谢谢！

Sergio

The Combobox "Type" is "Drop List" and the Combobox "Owner Draw" is "No".
Why am not I able to made list box of the combobox visible?

Thanks!

Sergio

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