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1. #Best excel vba tutorial 2018 how to#
2. #Best excel vba tutorial 2018 code#
3. #Best excel vba tutorial 2018 download#
4. #Best excel vba tutorial 2018 windows#

The above subroutine will still store the current value of the high-resolution performance counter in the module variable curEndCounter. The milliseconds timer can be stopped with the line: Call MilliSecondTimer_End

#Best excel vba tutorial 2018 code#

From that point onward, you can write any VBA code that you wish to measure the elapsed time. This subroutine will store current value of the high-resolution performance counter in the module variable curStartCounter. You can start the millisecond timer with the line: Call MilliSecondTimer_Start 'Purpose: Sample code to measure elapsed time in milliseconds I’m assuming you are an intermediate VBA coder and already have the codes copied and placed in a VBA code module.

#Best excel vba tutorial 2018 how to#

I think it will benefit you further if I explained how to use the VBA codes in your own projects. LgResult = QueryPerformanceFrequency(curFrequency)ĭebug.Print "Elapsed time (ms): " & (curEndCounter - curStartCounter) / curFrequencyĮnd Sub How to use the Excel VBA codes in your projects LgResult = QueryPerformanceCounter(curEndCounter) LgResult = QueryPerformanceCounter(curStartCounter) 'Purpose: Measure elapsed time in milliseconds

#Best excel vba tutorial 2018 download#

You can download the Excel workbook with the millisecond timer VBA codes to save bit of time.īest-milliseconds-timers-Excel-VBA Download Option Explicitĭeclare PtrSafe Function QueryPerformanceCounter Lib "kernel32" (lpPerformanceCount As Currency) As Longĭeclare PtrSafe Function QueryPerformanceFrequency Lib "kernel32" (lpFrequency As Currency) As Longĭeclare Function QueryPerformanceCounter Lib "kernel32" (lpPerformanceCount As Currency) As Longĭeclare Function QueryPerformanceFrequency Lib "kernel32" (lpFrequency As Currency) As Long

#Best excel vba tutorial 2018 windows#

So let’s put these 2 Windows API function declarations at the top of a code module and use it to measure elapsed time in seconds but with milliseconds accuracy. ' Performance counter API'sĭeclare PtrSafe Function QueryPerformanceCounter Lib "kernel32" _Īlias "QueryPerformanceCounter" (lpPerformanceCount As Currency) As Longĭeclare PtrSafe Function QueryPerformanceFrequency Lib "kernel32" _Īlias "QueryPerformanceFrequency" (lpFrequency As Currency) As Long The Complete VBA Code for Millisecond Timer Using Windows APIs So we can change the declarations slightly to use the native VBA 64-bit integer data type Currency. A quick web search on the phrase “Windows API LARGE_INTEGER” tells us that it “Represents a 64-bit signed integer value”. If we use this declaration as it is, VBA will give us a compile error: “User-defined type not defined”. Notice that the arguments to both Windows APIs have the data type LARGE_INTEGER. "QueryPerformanceFrequency" (lpFrequency As LARGE_INTEGER) As Long What is this LARGE_INTEGER ? "QueryPerformanceCounter" (lpPerformanceCount As LARGE_INTEGER) As Longĭeclare PtrSafe Function QueryPerformanceFrequency Lib "kernel32" Alias _ A quick search for “ QueryPerformanceFrequency” and “ QueryPerformanceCounter” in the text file “ Win32API_PtrSafe.TXT” which is the list of Windows API function declarations for VBA yielded this: ' Performance counter API'sĭeclare PtrSafe Function QueryPerformanceCounter Lib "kernel32" Alias _ In a previous article I described how this is done (you might want to go read that before continuing on here). Step 2: How to Use a Windows API Function within Excel VBA

So to measure time with milliseconds accuracy, we calculate this formula: (“End Performance Counter” – “Start Performance Counter” ) / Performance Frequency. Excellent! So we can use two Win32 APIs QueryPerformanceFrequencyfunction to express the frequency (in counts per second) and the QueryPerformanceCounter function to retrieve the current value of the high-resolution performance counter. However, looking at native VBA and Excel time related functions they only provide up to seconds accuracy.Ī web search on “timers using Windows API” eventually lead to this documentation on high resolution timers in Win32 APIs. Ideally this timer should be able to measure up to millisecond resolutions. Our motivations to create a millisecond timers is to allow us to measure the execution time for a piece of VBA code. In this tutorial, not only I will show the complete VBA codes that you can simply copy and use, I will describe the research process involved to create millisecond timers in VBA using Windows APIs so that you can deepen your understanding of using Windows APIs with VBA coding. There are numerous sites that provide sample VBA codes for creating millisecond resolution timers. Step 1: Search for the Right Windows API to solve a problem