Excel Visual Basic Variables, Part 2: Declaring and Naming Variables, Scope and Lifetime
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The Manning formula for open-channel flow is: whereV= Velocityn = Manning’s “n”,r = Hydraulic radius = area / wetted perimeter = b*y / (2*y + b) for a rectangular channel (where y = depth and b = width), ands = slope of channel (m/m). Discharge Q = V*A = V*b*y. We cannot solve this…
You can record a macro to copy from and paste to the Excel worksheet. Easy enough. But what if you have a value in Microsoft Excel VBA that you want to put on the clipboard for another program? Or you want your code to get text from the clipboard after you copied it there from…
1. What are Objects and Collections? Visual Basic defines a number of what it calls Objects. Examples of Objects are: In object-orientated terminology, Objects belong to Classes. Collections are groups of Objects. Here are some examples of Collections that Visual Basic defines: 2. The Excel Object Model Excel, too, has objects of its own. When…
You can use Excel Visual Basic to read and write text files (Sequential and Random file access). But we will not touch on text files in this post. Rather, we will look at how to save and open Excel files using Excel code, plus a few valuable functions: The bigger examples below are in the…
This is an excerpt from Microsoft Excel 2000 Visual Basic Help. 1. Objects and Collections An object represents an element of an application, such as a worksheet, a cell, a chart, a form, or a report. In Visual Basic code, you must first identify an object. Only then can you apply one of the object’s…
In Alice in Wonderland by Lewis Carroll, at the trial of the Knave of Hearts, the White Rabbit asks the King how to read the evidence. “Begin at the beginning, the King said, very gravely, and go on till you come to the end: then stop.” It would be easy if all computer programs did…