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Q36917: INFO: DlgDirSelect() Has Undocumented Behavior

Article: Q36917
Product(s): Microsoft Windows Software Development Kit
Version(s): WINDOWS:3.0,3.1
Operating System(s): 
Keyword(s): kb16bitonly kbCtrl kbListBox kbSDKPlatform kbGrpDSUser
Last Modified: 06-NOV-1999

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The information in this article applies to:

- Microsoft Windows Software Development Kit (SDK) versions 3.0, 3.1 
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SUMMARY
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If you use DlgDirSelect() to get the selection from a list box and there is no
selection, DlgDirSelect() returns zero and leaves the output string unchanged.

Clicking in the white space after the last item in a list box is one reason there
may not be a selection.

Because DlgDirSelect() returns 0 (zero) when the selection is a file and 0 when
there is no selection at all, using the return value alone is not enough to
determine if there is a current selection. One way to determine if there is a
selection is to send the LB_GETCURSEL message to the list box. If the return
value is not LB_ERR from this message, there currently is a selected item in the
list box.

Additional query words:

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Keywords          : kb16bitonly kbCtrl kbListBox kbSDKPlatform kbGrpDSUser 
Technology        : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK300 kbWinSDK310
Version           : WINDOWS:3.0,3.1
Issue type        : kbinfo

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