Useful TIP
You probably know that the WL
API keyword returns "only" a long integer whatever the real value returned by the underlaying api call.
What to do, if the returned value is a pointer to a structure or indeed a real value?
Then the WL
Transfer comes to rescue, here is an example showing you how to turn the Long integer (4-byte int) into a Single 4-byte real.
// Example based on the GDImage encapsulation
FUNCTION ZI_GetZoomValue(LOCAL hWnd is int)
nRet is int = ZI_GetProperty(hWnd, ZI_ZoomFactor)
rValue is 4-byte real // <----------
Transfer(&rValue, &nRet, 4) // <----------
IF rValue < 0.001 THEN rValue = 1
RESULT rValue
...
