Here's a diddy I wrote that some VFP developers who use a lot of images in their app might find helpful. This checks percent of total physical memory in use and does a CLEAR RESOURCES if your passed-in percentage is exceeded. Because of the extensive caching that VFP does with images, it helps your VFP app be a better neighbor.

PROCEDURE CheckAdjustMemory
LPARAMETERS PctMax
LOCAL  cBuffer
DECLARE GlobalMemoryStatus IN Kernel32 STRING @ lpBuffer
cBuffer = REPLICATE(CHR(0),32)
=GlobalMemoryStatus(@cBuffer)
* Percent of memory usage; 1st byte of 2nd DWord
IF ASC(SUBSTR(cbuffer,5)) > PctMax  
  CLEAR RESOURCES 
ENDIF
RETURN