Set a timer between two button clicks - vba

Question

I am using an Excel file with an Userform to control how long it takes for some people to complete a set of tasks.
I have an Userform that opens on start up and as soon as you click the button on it, the time starts counting. However, I don't really understand how I can do that.
I need the timer to run until the task is complete and the user clicks "Exit" or "Complete" and then save the time to my spreadsheet.

Answer 1

I propose slightly different approach. In the userform, declare variables:
Private startTime As Double
Private endTime As Double
Private blTime As Boolean
blTime is double that tells the application that the clock goes on. Then set value for startTime when userform is launched:
Private Sub UserForm_Initialize()
startime = Time
blTime = True
End Sub
I have assumed thet your button complete control is named cbComplete. Change to your button's real name
Private Sub cbComplete_Click()
If blTime Then endTime = Time
blTime = False
End Sub
The clock is turn off (blTime = False) when user click the button. You can add analogous code for other buttons as well but only the first click matters.
What we need is a way to get time that lapsed from the form. Use property:
Property Get Timespan() As Double
If Not blTime Then
Timespan = endTime - startTime
Else
Timespan = 0
End Property
Then, in module you can use command UserForm1.Timespan. Or format it nicely:
Format(UserForm1.Timespan, "hh:mm:dd")
Important: UserForm cannot be .Unload before, just .Hide.

Answer 2

You could adapt something like this:
Sub CalculateRunTime_Minutes()
'PURPOSE: Determine how many minutes it took for code to completely run
'SOURCE: www.TheSpreadsheetGuru.com/the-code-vault
Dim StartTime As Double
Dim MinutesElapsed As String
'Remember time when macro starts
StartTime = Timer
'*****************************
'Insert Your Code Here...
'*****************************
'Determine how many seconds code took to run
MinutesElapsed = Format((Timer - StartTime) / 86400, "hh:mm:ss")
'Notify user in seconds
MsgBox "This code ran successfully in " & MinutesElapsed & " minutes", vbInformation
End Sub
To suit your needs. Source is here
You can learn more about VBA's Timer function here
A second option would be to use the Now function which will give you the current time. So for example:
t = Now
.... run your tasks....
tfinal = Now
time_elapsed = tfinal - t