Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

You swapped from the output screen to the QuickC screen,
and QuickC does not have enough memory to restore the
output screen. If you try to swap back to the output
screen (F4), the output screen will be blank.
 
If you want to view the output screen, exit QuickC and
remove any memory-resident programs to free up memory.
If this doesn't work, try opening the Output window on
the QuickC screen to view output.