I'm trying to run some old FoxPro code under VFP9. The code include screen files (.SPR) generated under FPW2.6, so there are DEFINE WINDOW statements and @ row, col SAY statements, etc. The code compiles OK, but I'm running into some runtime issues.

One problem is that the screens go blank as soon as they are displayed and I move the mouse over a control such as a text box or command button. Why is this, and is their a way to prevent it?