Excel Visual Basic Variables, Part 1: Variable Types
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In an earlier post, we recorded two Excel macros in Visual Basic, and ran them. Then, in the next post, we viewed the code in the Excel Visual Basic Editor. Code you have recorded will usually run. However, you may want to change it for all sorts of reasons. To tidy it up, make it…
The built-in dialog boxes, MsgBox and InputBox$, are very useful for getting input from the user. But sooner or later you will want to go further. You might, while running code, want the user to make a choice from a list, or between several options. For this, you want a UserForm. For example: The program…
1. The Application Keyword Use “Application” to refer to Excel, e.g.: Application.ActivePrinter Name of the Active Printer.Application.Name Name of the program running (“Microsoft Excel”).Application.Path The path from which the program is running. 2. ActiveControl Instead of the name of a specific control (e.g. txtEdit), you can use the keyword ActiveControl. This will let your program refer…
1. MsgBox MsgBox (Message Box) brings up a dialog box with a title bar, a message of our choice, and a choice of icons and buttons. The function can return a value that tells us which button the user clicked. We have seen MsgBox in passing in earlier posts. Here is the syntax of the…
While you can pick these Shortcut Keys up from the menus in the Excel Visual Basic Editor, it is useful to have them all in one place. F1 Help on the highlighted itemF2 Object BrowserShift+F2 View Definition (Go to highlighted Sub or Function)F3 Repeat last FindF4 Display Properties WindowF5 Run / Continue RunF8 Single Step…
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…