Abstract
The CHistoryComboEx
based on the class ( CHistoryCombo) by Paul S.
Vickery, which enables you to read and save the
items of a ComboBox
from and to
the Registry.
You can use it also to display the contents of a
CRecentFileList object. CHistoryComboEx has the
same functions of CHistoryCombo, but instead of
the function (AddString()), I have added two new
implements to the function (InsertItem()).
How to use it?
- Copy (HistoryComboEx.cpp
and HistoryComboEx.h) to the folder of your
project.
- Click on
Project\Add To Project\Files... and then select
the two files of our class and insert them into
your project.
- Add
programmatically or using the "Resource Editor"
an Extended ComboBox control to your dialog.
- Using the
"Class Wizard", add a member variable of type
CComboBoxEx to your Extended
CComboBox
control. (I'll assume that your variable name is
"m_cbeCtrl")
- Now open the
header file of your dialog-box. Firstly, add
this line to the top of it:
#include "HistoryComboEx.h"
and then change
this line:
CComboBoxEx m_cbeCtrl;
to:
CHistoryComboEx m_cbeCtrl;
- Add the
following line to the end of your "OnInitDialog()"
or "OnInitialUpdate()" function:
m_cbeCtrl.LoadHistory("Addresses", "HistoryComboEx");
This line will
add key names "Addresses" to the default key of
your application in the Registry. Note: You can
change "Addresses" and "History
ComboEx" to any other values.
- Add the
following line to the handler, which will be
running, when your application is going to be
closed. (OnOK() for example!):
m_cbeCtrl.SaveHistory();
That's all!
Functions
Here I will write
a summary for the functions of CHistoryComboEx.
For details please see "HistoryComboEx.cpp". Note:
The documentation is the same of that one by Paul
S. Vickery's "CHistoryCombo".
CString LoadHistory( LPCTSTR lpszSection,
LPCTSTR lpszKeyPrefix,
BOOL bSaveRestoreLastCurrent = TRUE,
LPCTSTR lpszKeyCurItem = NULL);
CString LoadHistory( CRecentFileList* pListMRU,
BOOL bSelectMostRecent = TRUE);
void SaveHistory(BOOL bAddCurrentItemtoHistory = TRUE);
int InsertItem(const COMBOBOXEXITEM *pCBItem)
int InsertItem(CString strItem)
void SetMaxHistoryItems(int nMaxItems);
void ClearHistory(BOOL bDeleteRegistryEntries = TRUE);
Example
The Demo shows
you how to use "CHistoryComboEx" to save and load
URLs.
If you have any
questions or comments, please let me know!
Downloads
Download source - 49 Kb
E-XD++Visual
C++/ MFC Products
