I've been asked to make copy & paste work from within the text fields of my VFP application

I tried:

ON KEY LABEL CTRL+C SYS(1500,"_MED_COPY","_MEDIT")

ON KEY LABEL CTRL+P SYS(1500,"_MED_PASTE","_MEDIT")

Control+P, pastes what's in the paste buffer, but CTRL+C doesn't put any highlighted text into the clipboard?

Am I on the right lines?