XPLMGetWindowGeometryOS
XPLM_API void XPLMGetWindowGeometryOS(
XPLMWindowID inWindowID,
int * outLeft, /* Can be NULL */
int * outTop, /* Can be NULL */
int * outRight, /* Can be NULL */
int * outBottom); /* Can be NULL */
This routine returns the position and size of a “popped out” window (i.e., a window whose positioning mode is xplm_WindowPopOut), in operating system pixels. Pass NULL to not receive any parameter.