You could use Tk::After (doc) and give it a callback and time ... i am not sure if that will work on Win32, but i believe so. If you want to get really tricky, you could also use Win32::OLE or Win32::API to access the VB timer object, or other Win32 naitive function, directly. Lastly (and, i am sure this is not the last, but the last i have right now), you could fork a process to keep track of the time, and use IPC to update the label ... seems a bit complex for what you want though. Also, a pretty good clock inplimentation is here(analog), or maybe Tk::Clock ?
in reply to alarms and timers on Win32
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