In this case the gradient is undefined (as we cannot divide by 0):m = yA − yBxA − xB = 4 − 12 − 2 = 30 = undefinedSo just rely on the fact that:a vertical line is parallel to another vertical line. a vertical line is perpendicular to a horizontal line (and vice ...
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1) How to brake out of a recursive function? 2) Is there and easlier to find a node in a treeview control by node name? below is a copy of the two procedures I am using to try this. prettyprint 复制 Public Function SelectNode(ByVal strNodeName As String) As TreeNode Dim My...