If the parameter \fBto_screen\fR is \fBTRUE\fR, the pointers
\fBpY, pX\fR must reference the coordinates of a location
inside the window \fBwin\fR.
They are converted to window-relative coordinates and returned
through the pointers.
If the conversion was successful, the function returns \fBTRUE\fR.
If the parameter \fBto_screen\fR is \fBTRUE\fR, the pointers
\fBpY, pX\fR must reference the coordinates of a location
inside the window \fBwin\fR.
They are converted to window-relative coordinates and returned
through the pointers.
If the conversion was successful, the function returns \fBTRUE\fR.