Its always get error (1 Viewer)

[Shamass94]

Hi guys...
This code is working on windows7, but when i use it on windows 10 its give me error... Plz help

 

[pbaldy]

I had this problem with emails. You can either use a variable for the value, or the appropriate conversion function around the form reference (CStr(), CLng(), etc).

 

[Shamass94]

I am sorry man but I am new on this software, plz can you specify more how to use it?! thanks

 

[pbaldy]

.Duration = CInt(Me.ApptLength)