XPLMGetWindowGeometryVR

XPLMGetWindowGeometryVR

XPLM_API void       XPLMGetWindowGeometryVR(
                         XPLMWindowID         inWindowID,
                         int *                outWidthBoxels,    /* Can be NULL */
                         int *                outHeightBoxels);    /* Can be NULL */

Returns the width and height, in boxels, of a window in VR. Note that you are responsible for ensuring your window is in VR (using XPLMWindowIsInVR()).