You'll recall that you can select multiple controls when designing
a VB application by holding the Ctrl key and clicking the mouse on successive controls in
the same container. You can also select multiple controls in the same physical area of the container
by using the "lasso" method: holding down the mouse button outside any control on
the container and keeping it down while you "lasso" or mark an area holding
several controls (a rectangle of dotted lines appears around the lassoed area).
It's therefore possible that the developer could have selected more
than one control when your Property Page is active. In order for you to detect which controls
the developer has currently selected, the SelectedControls collection is available in the code of a Property
Page. It contains all controls currently selected by the developer. The SelectedControls collection
is zero-based. That is you would denote the first element of SelectedControls in your code
by:
SelectedControls(0)
The SelectedControls collection has a
Count property to tell you how many controls are in the collection. Since
SelectedControls is zero-based, you would denote the last control in the collection by:
SelectedControls(SelectedControls.Count - 1)
You can refer to the property settings of one of the controls in
SelectedControls with the normal object.property syntax, as in this example:
SelectedControls(0).Backcolor
Normally you'll use the SelectedControls collection at the following
places in your Property Page's code:
