Screen Refresh turns on screen updating for just one instruction and then immediately turns it off.
A point to note is that a cell will be marked for recalculation if it has a volatile function, even though you may be nested deep within a conditional formula and you expect is to be called rarely.
For example, if you have a formula like =if(value1 value2, rand(),0), the cell will be recalculated even though value1 and value2 may not change.
You won't be able to see what the macro is doing, but it will run faster.
Turn screen updating off to speed up your macro code.
Load workbook in memory when the workbook is first opened. Track all dependencies and build an initial “calculation chain”.
As a part of building this chain, it also tries to sequence all the calculations so that those cells which are the ‘least’ dependent on other cells are stacked at the beginning of the chain and the ones that are ‘most’ dependent are stacked towards the end of the chain. Calculate the cells that are marked in the chain one by one, starting from the top and proceeding along to the bottom of the chain.
The example hides every other column on Sheet1, while keeping track of the time it takes to do so.
The first time the example hides the columns, screen updating is turned on; the second time, screen updating is turned off. Hidden = True End If Next c stop Time = Time elapsed Time(i) = (stop Time - start Time) * 24 * 60 * 60 Next i Application.
Updates the display on the monitor with the current information in the video memory buffer. Subsequent instructions don't update the screen until screen updating is turned on again with the Screen Updating property.