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Excel VBA: Call and Run

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Tue 28 Apr 2009, 10:35 replyReply Delegate Simon said...

Simon has attended:
Excel VBA Intro Intermediate course
Excel VBA Advanced course

Excel VBA: Call and Run


What is the difference between a CALL statement and a RUN method?

I have been happily calling sub-procedures since my course (okay, I've done it once or twice), however I recently tried to do this in an inherited spreadsheet and I got an error message (which I can't remember). I noticed that a couple of other sub-procedures that were there already were 'run'.

With a bit of experementation I have established that both versions of the syntax below produce the same result (as far as I can see):

[...] Call SelectOpeningIndicator
Call ToggleToolbars
Call showbars


[...] Run "SelectOpeningIndicator"
Run "ToggleToolbars"
Run "showbars"

so what's the difference?



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Thu 30 Apr 2009, 16:13 replyReply Trainer Anthony said...

RE: Excel VBA: Call and Run

Hi Simon. Call and Run may seem to be interchangeable, but Calling a procedure from within the code is "tidier" (in the memory usage sense) than Running it, and I suspect this has caused the errors you encountered. The "call" command invokes a named procedure (and you would normally "call" a procedure from another procedure in a program, rather than "run" it) whereas Run invokes a procedure (and probably resets all your variable declarations) which happens to be named. "Run" is a command which you'll recognise even from the version of BASIC on a ZX Spectrum, and earlier - "Execute" is used on different platforms for similar purposes - whereas "Call" is the programmatic, procedural equivalent and using the two commands interchangeably has processing, variable declaration, ramifications. In a nutshell, the difference is one of arcane programming requirements and when coding I'd "Call" my procedures!

Hope this helps,


Fri 1 May 2009, 10:28 replyReply Delegate Simon said...

RE: Excel VBA: Call and Run


Thanks, this is useful to know. (I wrote my first code on a ZX81, although I have been out of a coding environment since the end of the 1980s).

I suspect that the 'Run' commands that I have inherited are some kind of legacy programming and I am replacing 'Runs' with 'Calls' as I come across them. This has gone okay... so far!




Excel tip:

Use the Ctrl-key for quick navigation in Excel 2010

If you want to move quickly to the right, left, top or bottom of your spreadsheet, just press Ctrl and one of the arrow keys. If you want to then select all the data in that particular row or column, hold down the Shift key and press Ctrl and an arrow key.

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