How do I call these two API functions GetDialogBaseUnits and MapDialogRect in VFP. I'm trying to get the convert dialog units into pixels using the following formula:

pixelx = (dialogunitX * baseuntX) /4
pixely = (dialogunitY * baseuntY) /8

I need to calculate the baseunitX and baseunitY. I have readup and found that these two functions should give me the values to the two variables. Or is there another way to get these values from within VFP

Thanks in advance.