In a version 4.0 application, a list box that is part of a combo box uses the WM_CAPTURECHANGED notification message to hide its drop-down list if it is open. For more information, see "Combo Boxes" later in this topic.
The DDL_EXCLUSIVE flag of the DlgDirList function does not have the expected result in a version 3.x application. Specifically, the flag does not exclude read-write files from the list. In a version 4.0 application, the DDL_EXCLUSIVE flag excludes read-write files.
If a list box in a version 3.x application has either the WS_HSCROLL or WS_VSCROLL style, the list box receives both horizontal and vertical scroll bars. Although one of the scroll bars is typically hidden, Windows 95 displays the hidden scroll bar if its scrolling range becomes greater than zero. In a version 4.0 application, a list box does not receive a horizontal scroll bar, unless it has the WS_HSCROLL style. Likewise, it does not receive a vertical scroll bar unless it has the WS_VSCROLL style.
When creating a list box in a version 3.x application, Windows 95 always increases the size of the list box by adding the border width to each side. This is done because Windows 95 assumes that the dimensions specified by the application or the dialog template are for the client area of the list box. Unfortunately, increasing the size in this way makes aligning a list box rather difficult. Windows 95 does not increase the size when creating a list box in a version 4.0 application; Windows 95 assumes that the specified size includes the borders.