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Cancel looping statement
- Thread starter sisan
- Start date
You have to set a flag for your loop and monitor for the keypress event of the currently focused object. The Ascii Code for the ESC key is 27.
Should be something like this:
Private s As Long
Private Sub Command1_Click()
s = 1
i = 0
Do While s = 1
Text1.Text = i
i = i + 1
DoEvents
Loop
End Sub
Private Sub Command1_KeyPress(KeyAscii As Integer)
If KeyAscii = 27 Then s = 0
End Sub
Should be something like this:
Private s As Long
Private Sub Command1_Click()
s = 1
i = 0
Do While s = 1
Text1.Text = i
i = i + 1
DoEvents
Loop
End Sub
Private Sub Command1_KeyPress(KeyAscii As Integer)
If KeyAscii = 27 Then s = 0
End Sub
You can't interrupt any ongoing process, such as a
loop, except by placing the line DoEvents in an
iteration. DoEvents causes the program to temporarily stop,
see if there are any other commands that also need doing,
and work on those for a while.
Otherwise, your PC is so busy executing the loop that
it never has time to see your "Halt!" command.
loop, except by placing the line DoEvents in an
iteration. DoEvents causes the program to temporarily stop,
see if there are any other commands that also need doing,
and work on those for a while.
Otherwise, your PC is so busy executing the loop that
it never has time to see your "Halt!" command.
DoEvents switches control to the operating-environment kernel. Control returns to your application as soon as all other applications in the environment have had a chance to respond to pending events. This doesn't cause the current application to temporarily stop or give up the focus, but it does enable background events to be processed.
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