mfc中怎么使组合框可编辑

mfc中如何使组合框可编辑?
组合框关联了一个变量,想把该变量里的内容赋给组合框里,显示在组合框里,但是不能实现,怎么解决,求指教?

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CComboBox::AddString()/InsertString()
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"组合框关联了一个变量" 
组合框应该关联成控件。(control)
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楼主要学会查询MSDN
CComboBox::AddString
int AddString( LPCTSTR lpszString );

Return Value

If the return value is greater than or equal to 0, it is the zero-based index to the string in the list box. The return value is CB_ERR if an error occurs; the return value is CB_ERRSPACE if insufficient space is available to store the new string.

Parameters

lpszString

Points to the null-terminated string that is to be added.

Remarks

Adds a string to the list box of a combo box. If the list box was not created with the CBS_SORT style, the string is added to the end of the list. Otherwise, the string is inserted into the list, and the list is sorted. 

To insert a string into a specific location within the list, use the InsertString member function.
C/C++ code
// The pointer to my combo box.
extern CComboBox* pmyComboBox;

// Add 20 items to the combo box.
CString str;
for (int i=0;i < 20;i++)
{
   str.Format(_T("item string %d"), i);
   pmyComboBox->AddString( str );
}

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m_combo1.AddString("A1");
m_combo1.AddString("A2");

m_combo1.InsertString(1,"B1");
m_combo1.InsertString(2,"B2");

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m_combo.SetWindowText("");
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如果有两条
m_combo.DeleteString(1);
m_combo.DeleteString(0);

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CComboBox::ResetContent
或者
for (int i=0;i < pmyComboBox->GetCount();i++)
{
pmyComboBox->DeleteString( i );
}
都行
------解决方案--------------------
组合框关联的变量,这个变量保存的是选择的索引。