>>Is there any difference between these two functions - Dragan's anticipated comments aside - or advantage of one over the other?
>>

>>IF VARTYPE( THISFORM.tmrCheckMousePosition ) = 'O'
>>

>>

>>IF PEMSTATUS(THISFORM.tmrCheckMousePosition,'O',3)
>>

>
>Are equal for not protected or hidden properties, but :
>
>

>CLEAR
>X = CREATEOBJECT("XX")
>? PEMSTATUS(m.x,"property",5)
>? VARTYPE(x.undef)				&& This work !!!!
>? VARTYPE(x.property) 			&& Expected : "U" too ; Error ! this is a BUG
>
>DEFINE CLASS xx as Custom
>	PROTECTED property 
>	
>	PROCEDURE Init
>	? PEMSTATUS(m.this,"property",5),VARTYPE(this.property)
>	
>ENDDEFINE
>

Why did it error on this line?

? VARTYPE(x.property) 			&& Expected : "U" too ; Error ! this is a BUG