Microsoft KB Archive/129428

= INFO: CListBox::SelItemRange Selects Only Two or More Items =

Article ID: 129428

Article Last Modified on 11/21/2006

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APPLIES TO

 Microsoft Foundation Class Library 4.2, when used with:  Microsoft Visual C++ 2.0 Professional Edition

 Microsoft Visual C++ 2.1 

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This article was previously published under Q129428



SUMMARY
The documentation for CListBox::SelItemRange says that it can be used to select one or more items in a CListBox. This is not correct. SelItemRange can only be used to select two or more items. This is because CListBox::SelItemRange uses the windows message LB_SELITEMRANGEEX which deselects the item if the first and last index of the range are equal.



MORE INFORMATION
Here are two possible ways to enable the ability to select one or more items:
 * Test for the condition when the first and last items are equal, and in that case, use CListBox::SetSel. -or-


 * Use the windows message LB_SELITEMRANGE. The following code fragment demonstrates how to use this message. The code works when CMyListBox is derived from CListBox.

Sample Code
int CMyListBox::MySelItemRange (BOOL bSelect,                               int nFirstItem,                                int nLastItem) {  ASSERT_VALID(this); return (int)SendMessage(LB_SELITEMRANGE,                             bSelect,                              MAKELPARAM(nFirstItem,nLastItem)); } NOTE: This problem was fixed in Microsoft Visual C++, 32-bit Edition, version 4.0. The following is from the Visual C++ 4.0 Books On-Line entry for CListBox::SelItemRange:

Selects multiple consecutive items in a multiple-selection list box.

Use this member function only with multiple-selection list boxes. If you need to select only one item in a multiple-selection list box that is, if nFirstIem is equal to nLastItem call the SetSel member function instead.

Additional query words: 2.00 2.10 3.00 3.10 4.00 noupdate

Keywords: kbbug kbcode kbdocfix kblistbox kbuidesign kbvc400fix KB129428

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