>In a FoxPro 2.6 Windows application, when start a program that could run a long time, how do you interrupt the program by pushing a "Cancel Button" ?, I do not know what to check for when the cancel button is pushed.
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>Thanks in advance

Pushing the Cancel button, provided it has the \? string in it's setting, will set lastkey() to 27 ie it's as if the escape key is pressed. You must have the prompt defined as say "\?Cancel"
HTH